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Satya Nadella, chief executive officer of Microsoft Corp., speaks during an Economic Club of New York event in New York, U.S., on Wednesday, Feb. 7, 2018. Nadella discussed the responsibility tech companies need to take over the future of artificial intelligence.
Mark Kauzlarich | Bloomberg | Getty Images

Personal computers with Windows have made sounds to indicate errors since the 1980s. With Windows 11, Microsoft has revamped those sounds to make them less stressful.

Windows remains the world’s most popular operating system, accounting for about 14% of Microsoft’s $168 billion in annual revenue. But it isn’t always easy for Microsoft to keep its hundreds of millions of customers happy, as they have widely varying opinions of what Windows should be — including what it should sound like.

The designers of Windows 11 took inspiration from an approach called calm technology, which was described by two employees of the Xerox PARC research lab more than two decades ago. “Calmness is much needed in today’s world, and it tends to hinge on our ability to feel in control, at ease, and trustful,” Microsoft’s Christian Koehn and Diego Baca wrote in a blog post. “Windows 11 facilitates this through foundational experiences that feel familiar, soften formerly intimidating UI, and increase emotional connection.”

Calm technology also informed the development of the sounds of Windows 11, said Matthew Bennett, who crafted the sounds, following contributions to Windows 8 and Windows 10.

Windows 11 stands out from its predecessors and its competitors by allowing people to use one group of sounds to match with light visual themes, and a different group that goes along with dark themes. The sounds are similar, which means people can recognize them as they switch between modes, but slightly different. Applying a dark theme generally makes the sounds softer. They seem to echo, as if in a large room.

“The new sounds have a much rounder wavelength, making them softer so that they can still alert/notify you, but without being overwhelming,” a Microsoft spokesperson told CNBC in an email. Just like we rounded UI [user interface] visually, we rounded our soundscape as well to soften the overall feel of the experience.”

People can change the default sounds by opening the Settings app and going to “Sound > More sound settings.” But plenty of people will keep using the default sounds, just as many people who open Microsoft Word will end up using the default font.

Bennett, who left Microsoft in February after 12 years at the company, spelled out several changes the company made to its system sounds with Windows 11 during the course of multiple interviews. (Each of the audio files below contains the new sound, followed by its Windows 10 predecessor.)

Default Beep

When something goes wrong — for example, you look for text on a website and it isn’t there — and your PC needs to give you a heads up, Windows 11 won’t make as much of a fuss as Windows 10. The new sound, comprising three rising notes, starts at a lower pitch than the trill that it replaces, and it doesn’t linger as long afterward, Bennett said.

The notes aren’t simply played by a piano or marimba. Bennett said the sounds are “digitally sculpted” and designed not to evoke a musical instrument. That way, they’re less likely to get negative associations in various cultures around the world, he said.

Calendar Reminder

Four rapid ascending notes let you know an event is coming up. The arrangement is vastly simpler than the seven-note predecessor, which Bennett has described as having a clear beginning, middle and end.

After Windows 10 arrived in 2015, people ran it in schools and offices, where background noise could deafen some of the Calendar Reminder sound. Then the coronavirus pandemic forced workers, teachers and students to stay home, where there might be fewer distractions. The new sound demands less attention in those environments.

Desktop Mail Notification

When you receive an email in Windows 11, you hear three quick notes going downward. The new version is slightly faster — the one in Windows 10 included four notes and sustained for a moment at the end — and registers a lower pitch.

It’s more of a gesture, reminiscent of a piece of mail arriving in an inbox, and less of a voice-like snippet. “I read it as, “Message for you,'” Bennett said.

Device Connect, Device Disconnect, Device Failed to Connect

These areas of the next generation of Windows refer back to the stripped-down effects that appeared in Windows Vista and remained available in Windows 7, Bennett said. Anytime you plugged a mouse, a joystick or another peripheral into a USB port, or removed it, or the computer didn’t recognize the device, those 2000s-era operating systems made two abbreviated, guttural noises.

Windows 10 veered from that concept a bit with additional notes and varying melodies. Each of the Windows 11 sounds goes back to the idea of two simple notes, albeit in a more friendly fashion than their predecessors from the 2000s.

An upward tone conveys that the connection worked.

Going down means you’ve successfully unplugged.

And two sounds imply an error, sort of like how parents who speak a variety of languages will quickly say “uh-uh” to warn their children not to do something, Bennett said.

Instant Message Notification, Message Nudge

Sounds for calendar events and emails can play frequently on Windows PCs, but sounds that indicate new instant messages are far less frequent, Bennett said.

But they’re still there, and in Windows 11, they’re simpler. Three descending notes go off to mark a new message, instead of a chirp that goes up and then down. The Windows 10 message sound was meant to stand out from the mail sound to reflect the different rhythm of messaging, Bennett said. Now that distinction is more subtle.

The point of the Message Nudge is to signal the arrival of a new message coming in through a program that’s you’re currently using, but perhaps in a different conversation, Bennett said. In Windows 11 you hear one note and then a slightly lower note. It’s shorter than the sharp Windows 10 sound, which amounts to a miniaturized version of the Instant Message Notification sound in that operating system.

Notification

This sound, which comes up in concert with certain “system toast” boxes on the side of the screen, has also received a makeover. There are two slightly ascending notes that are close together, instead of four notes that rise and then fall. The sound is shorter, and the final note isn’t sustained for so long.

Windows User Account Control

When a program asks for permission to make changes to your PC, Windows 11 shows a prominent dialog box on your screen and plays a sound. The outcome can have security implications, hence the notification.

In Windows 11 the sound is an up-down-up pattern that comes in at a lower pitch than the down-up-down chime. It’s less all-hands-on-deck and more you-might-want-to-check-this.

So far, much of the new feedback on the new sounds has been positive, after Microsoft began circulating Windows 11 builds to testers in June.

The company will release Windows 11 more widely later this year.

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Oracle’s AI-fueled debt load has investors on edge ahead of quarterly earnings

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Oracle's AI-fueled debt load has investors on edge ahead of quarterly earnings

Oracle CEOs Clay Magouyrk and Mike Sicilia sit down with CNBC’s David Faber on Oct. 13, 2025.

CNBC

It’s been a rollercoaster year for Oracle investors, as they try to assess the strength of the software giant’s position in the artificial intelligence boom.

The stock is up more than 30% for the year even after a 23% plunge in October, which was its worst month since 2001. It’s recovered a bit in November, climbing almost 10% for the month as of Tuesday.

Heading into the company’s fiscal second-quarter earnings report on Wednesday, pressure is building on management — and newly installed CEOs Clay Magouyrk and Mike Sicilia — to show that Oracle can continue to finance the company’s aggressive infrastructure plans while simultaneously convincing Wall Street that the AI-fueled hypergrowth story remains intact.

In recent months, Oracle has emerged as a more central player in AI, largely due to a $300 billion deal with OpenAI, which came to light in September, an agreement that involves the AI startup buying computing power over about five years, starting in 2027.

Funding Oracle’s compute buildout is going to require mounds of debt. In late September, Oracle raised $18 billion in a jumbo bond sale, one of the largest debt issuances on record in the tech industry, and the company is now the biggest issuer of investment grade debt among non-financial firms, according to Citi.

“There is something inherently uncomfortable as a credit investor about the transformation of the sort we’re facing that is going to require an enormous amount of capital,” Daniel Sorid, head of U.S. investment grade credit strategy at Citi, said on a video call to investors on Friday, a replay of which was provided to reporters.

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Oracle has secured billions of dollars of construction loans through a consortium of banks tied to data centers in New Mexico and Wisconsin. Citi analyst Tyler Radke estimates Oracle will raise roughly $20 billion to $30 billion in debt every year for the next three years.

As of August, the company’s combined short-term and long-term debt, which includes lease obligations, sat at $111.6 billion, up from $84.5 billion a year earlier, according to FactSet, while cash and equivalents slipped over that stretch to $10.45 billion from $10.6 billion.

As Oracle aims to build out sufficient capacity to meet the rising demand its seeing from customers like OpenAI, the street is questioning whether company will tap sources other than the debt market.

“Oracle will be looking at all options out there — off-balance sheet facilities, raising debt, issuing equity or perhaps exploring interest from a foreign investor, i.e. a sovereign wealth fund,” said Rishi Jaluria, a software analyst at RBC Capital Markets, in an interview. Jaluria recommends holding the stock.

A credit investor who spoke to CNBC highlighted Meta’s $27 billion deal with Blue Owl Capital, a joint venture between the two entities, as one type of financing arrangement being used for AI data center development.

The market is also debating whether Oracle can use vendor financing options to reduce the amount of upfront capital required to stand up data centers, including securing favorable financing terms with suppliers like Nvidia, a credit investor told CNBC. However in that scenario, Nvidia’s chips would be used as collateral, raisings concerns around GPU depreciation.

An Oracle spokesperson declined to comment.

Growing skepticism

The discomfort that Sorid referenced has driven Oracle’s 5-year credit default swaps to new multi-year highs. Credit default swaps are like insurance for investors, with buyers paying for protection in case the borrower can’t repay its debt. Bond investors told CNBC that they’ve become a popular way to hedge the risk tied to the AI trade.

Credit analysts at Barclays and Morgan Stanley are recommending clients buy Oracle’s 5-year CDS. Andrew Keches, an analyst at Barclays, told analysts in a note last month that he didn’t see an avenue for Oracle’s credit trajectory to improve. And in late November, Morgan Stanley analysts said Oracle’s CDS had attracted not just typical credit investors but “tourists” who have less experience with this type of financial instrument.

Spools of electrical wires outside a series of assembly tents during a media tour of the Stargate AI data center in Abilene, Texas, US, on Tuesday, Sept. 23, 2025. Stargate is a collaboration of OpenAI, Oracle and SoftBank, with promotional support from President Donald Trump, to build data centers and other infrastructure for artificial intelligence throughout the US.

Kyle Grillot | Bloomberg | Getty Images

Oracle’s revenue growth and backlog of business will be closely monitored as investors try to gauge whether the company’s spending plans are justified. Analysts expect to see revenue growth in the latest quarter of 15% to $16.2 billion, according to StreetAccount.

Remaining performance obligations, a measure of contracted revenue that hasn’t yet been recognized, are expected to surpass $500 billion, StreetAccount says, which would mark a more than fivefold increase from a year earlier. Oracle’s disclosure in September that RPOs jumped 359% to $455 billion sent the company’s stock up 36%, its best single-day performance since 1992.

Since then, the stock has wiped out all of those gains and then some.

Gil Luria, an analyst at D.A. Davidson, said that beyond infrastructure, he’ll be closely watching Oracle’s core database business, which is a source of much higher margins. That will help determine how much flexibility the company has in going to the capital markets, he said.

“Oracle can handle the debt load,” said Luria, who recommends holding the stock. “But they need more cash flow to raise more capital from here.”

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Teachers’ union AFT slams crypto market bill, warns of ‘profound risks’ for America’s retirement plans

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Teachers' union AFT slams crypto market bill, warns of 'profound risks' for America's retirement plans

Sen. Gillibrand says 'nothing is holding up' progress on crypto market regulation: CNBC Crypto World

The American Federation of Teachers, the powerful labor union that represents 1.8 million members, is urging the Senate Banking Committee to reconsider its crypto market structure bill, the Responsible Financial Innovation Act, calling the proposed legislation “as irresponsible as it is reckless” in a letter exclusively obtained by CNBC.

In the letter that AFT president Randi Weingarten sent to Senate Banking Committee Chairman Tim Scott (R-SC) and Ranking Member Elizabeth Warren (D-Mass.), she wrote the union opposes the bill based on the “profound risks to the pensions of working families and the overall stability of the economy.”

“The legislation on crypto we have seen weighed by the committee over the last few months gives us deep concern,” Weingarten added.

The AFT is concerned that in passing crypto legislation, the government will open the floodgates to widespread fraud and unethical practices across retirement plans including AFT pensions.

“This legislation pretends that crypto assets are stable and mainstream, and they are not. Rather than just being silent on crypto, this bill strips the few safeguards that exist for crypto and erodes many protections for traditional securities. If passed, it will undercut the safety of many assets and cause problems across retirement investments,” Weingarten wrote.

A specific issue the AFT cited with the proposed legislation it allowing non-crypto companies to put their stock on the blockchain and evade existing securities regulatory framework. Wall Street has become interested in the idea of “tokenization” of all financial assets, with Larry Fink, CEO of BlackRock, the largest asset manager in the world, a leader evangelist for the concept.

“This loophole and the erosion of traditional securities law will have disastrous consequences: Pensions and 401(k) plans will end up having unsafe assets even if they were invested in traditional securities,” Weingarten wrote.

She argued that the legislation being considered by the committee also does little to curb fraud, illegal activity and corruption that continues to be prevalent in crypto markets. Weingarten called the legislation “irresponsible” and “reckless.”

“We believe that if enacted, this bill has the potential to lay the groundwork for the next financial crisis,” she wrote.

NEW YORK, NEW YORK – AUGUST 28: Randi Weingarten, president of the American Federation of Teachers (AFT), speaks during the March on Wall Street on August 28, 2025 in New York City.

Michael M. Santiago | Getty Images News | Getty Images

The AFL-CIO, the nation’s largest labor union, stated its opposition to the Senate Banking Committee over a draft of the crypto bill in October.

CNBC also confirmed that on Thursday, the CEOs of Bank of America, Citi and Wells Fargo, will be meeting with lawmakers to discuss the crypto market structure proposals.

The currently proposed legislation, which builds on a bill that passed the House of Representatives over the summer, is co-sponsored by key crypto backer Senator Cynthia Lummis (R-Wyoming) and Senator Bernie Moreno (R-Ohio), alongside Chairman Scott. It aims to create structure for regulating digital assets, but also raises questions about tokenized securities that are not specifically cryptocurrencies.

Tokenization has been a key concern as the bill has gained momentum on Capitol Hill, and a hurdle to getting the support from Democrats that will be needed for passage. Previous CNBC reporting indicates that the Senate backers will need to attract votes from at least seven Democrats for the legislation to pass. At last week’s CNBC CFO Council Summit in Washington, D.C., Senator Mark Warner (D-Va.) told attendees, “I’m in crypto hell at this moment trying to get the market structure bill done.”

Warner is among a group of Democratic senators who met on Monday to review the Senate Banking draft and consider counter-offers, according to Politico.

Many Democrats, including Warren, have also been concerned about the balance of crypto regulatory oversight between the CFTC and the Securities and Exchange Commission. States, meanwhile, worry that their laws may be preempted by a new federal law, and the states left powerless to protect residents from fraud, a concern outlined by Massachusetts’ Secretary of State William Galvin in a letter to Senate Banking, writing that the “sweeping provisions that will exclude significant portions of the financial industry from state oversight. This is a recipe for disaster for millions of savers.”

Progress on the Senate’s version of a crypto market structure bill was stalled for weeks due to the longest government shutdown in U.S. history. Speaking on Tuesday morning at The Blockchain Association Policy Summit in Washington, D.C., Senator Lummis provided some insight into when the Senate’s version of a crypto market structure bill could be expected. She said her goal is to share a draft by the end of the week, then let the crypto industry as well as Republicans and Democrats vet it and proceed to markup next week.

CFTC announces listed spot crypto trading on U.S. regulated exchanges: CNBC Crypto World

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OpenAI hires Slack CEO Denise Dresser to lead global revenue strategy

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OpenAI hires Slack CEO Denise Dresser to lead global revenue strategy

Slack CEO Denise Dresser during TechCrunch Disrupt in San Francisco, Oct. 29, 2024.

David Paul Morris | Bloomberg | Getty Images

OpenAI on Tuesday announced that it’s tapped Slack CEO Denise Dresser as its new chief revenue officer.

Dresser will oversee the artificial intelligence startup’s global revenue strategy across both customer success and enterprise, OpenAI said in a release.

After spending more than a decade as an executive at Salesforce, Dresser was named Slack’s chief executive in 2023. Salesforce acquired the messaging company for more than $27 billion in 2020.

“I’ve spent my career helping scale category-defining platforms, and I’m looking forward to bringing that experience to OpenAI as it enters its next phase of enterprise transformation,” Dresser said in a statement.

OpenAI kickstarted the generative AI boom with the launch of its chatbot ChatGPT three years ago, and it’s quickly ballooned into one of the fastest-growing commercial entities on the planet.

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The startup said in November that it is on track to reach more than $20 billion in annualized revenue run rate this year, with plans to grow to hundreds of billions in sales by 2030.

But as competition heats up from rivals like Google and Anthropic, OpenAI is facing pressure to deliver. The company has made more $1.4 trillion in infrastructure commitments as it works to scale up its technology, and the immense sum has raised eyebrows and sparked concerns about a potential AI bubble.

More than 800 million people use ChatGPT every week, and OpenAI supports more than 1 million business customers.

Dresser will help more companies integrate AI into their daily operations, OpenAI said.

“We’re on a path to put AI tools into the hands of millions of workers, across every industry,” Fidji Simo, OpenAI’s CEO of Applications said in a statement. “Denise has led that kind of shift before, and her experience will help us make AI useful, reliable, and accessible for businesses everywhere.”

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