855-247-2962

I just got the same red page with warning while browsing WalMart.com.  Was using Chrome and used task manager to exit.

You did the right thing. Now go into Chrome, Settings. Advanced Settings, Content Settings and make sure Block Pop-ups is on and under Ads make sure intrusive sites ads are blocked. You could get even more protection from the scareware browser hijacks by installing an Ad Blocker add-on.

Microsoft will never, ever give you an error message with a phone number in it. A pop-up message doesn't mean your system is infected. if you're on Windows, just press CTRL+ALT+DELETE, click Task Manager, click the name of whatever browsing you're using from the list, and click End task.

FRAUD. My elderly father got a pop-up saying that Windows Defender had failed to block a virus and that he should call Microsoft tech support at this number. Unfortunately, he called and gave them his bank routing number and remote control of his machine. They said they were "reinstalling" Windows 10 and "fixing" some other things. They're stealing your data and setting up their own software that can detect keystrokes so they can get any passwords you type from there on out. They even made an appointment to call him back and "help" him with his taxes. If this happens to you, follow the steps on the FTC site for identity theft/data loss, plus change your account numbers, notify the IRS to set up a personal PIN so they can't file your taxes to get your return sent elsewhere, and contact the Social Security Administration plus any other entities you have financial transactions with (e.g. if you're getting a pension, let them know so the the thieves don't redirect your benefits to another account.

Error message popped up while I was on my laptop, saying I needed to call this number immediately to deal with Trojan Worm virus. Guy on the other end was very impatient and rude, said he was with Microsoft, that he would get a technician on my case ASAP but that I needed to pay for the service first. He initially said $199, took control of my laptop after walking me through the steps to do so, and the $199 option wasn’t in the drop down menu.

I got suspicious and googled the number, saw this thread. Immediately hung up and disconnected from the internet, he called back 4 times. I ignored each call.

I wish I would have checked the number before calling!  I made the mistake of calling the number and trusting these people.  I ended up being fooled out of a lot of money.  I decided to look up the company that came up on my bank account, as a pending charge, and discovered it was a scam.  I then checked out the number and was brought to this site.  Please, if you get one of these "warnings" do not fall for it like I did.  Do some research before making that call, and you will be relieved that you do not have an expensive learning experience!

It is much worse than that:

 
Thanks to Slim, another registered poster here and computer whiz:

Since the scammers accessed the computer, they probably did one or more of the following:
• Disabled the anti-virus software
• Added nasty malware to the computer
• Copied the Contact List (so they can spam/email your soon-to-be ex-friends)
• Copied any financial data or passwords they could find
• Compromised your ID on Facebook or other social site(s), and perhaps on shopping sites.
• "Zombied" the computer, so it would respond to THEIR commands sent via internet
• Deleted some important files
• Asked for money to repair the damage they caused

What can you do immediately after such an attack?
1.  Pull the cables on the computer, or otherwise disable it, so it cannot access the internet.
2.  Change ALL  passwords stored on the computer.
3.  Run FULL malware scans on the computer, in "SAFE" mode!
4.  Change the passwords again, particularly if the malware scans showed anything.
5.  Inform your bank and credit card companies.
6.  Sign up for credit monitoring, and check the status frequently
7.  Backup non-executable personal, data files to an external storage device.  (Executable files might be infected).
8.  You may have to bring the computer to a local repair shop, and tell them the story.
9.  Tell friends what happened, so they can be aware of strange emails from you.
10.  Connect to the internet only AFTER all the above have been done.
11.  Change the passwords on all online accounts.  Even better - access a "safe", uninfected  computer, and change your online account passwords RIGHT NOW.

NOTE:
If your computer set a "Restore Point" while it was infected, any "System Restore" you make will re-infect your computer.  Suggest you delete any potentially infected restore points and avoid setting such restore points until after your computer has been thoroughly cleaned!

You fell for one scam, and might be susceptible to others mentioned on this site:
http://phonehelp.2truth.com/facts.html
Read that info to educate and help protect yourself!

Honest computer companies do NOT cold-call people, or cause popups from websites to tell them their computers need fixing!

Some scammers even have websites, and falsely advertise they are associated with popular software packages or computer companies; so do NOT believe a "we will fix your computer remotely" site, and allow them access to your computer!

Read the info at these links.
http://news.softpedia.com/news/Cold-Call-Tech ... on-150170.shtml
http://www.consumer.ftc.gov/articles/0346-tech-support-scams

https://www.microsoft.com/en-us/security/portal/mmpc/shared/ransomware.aspx

Lesson:
If your computer needs fixing, bring it to a local repair shop