Microsoft Support Scam UK: Spot Fake PC Virus Calls
Scammers impersonating Microsoft support are targeting UK computer users with fake error pop-ups and threatening phone calls — here's how to protect yourself.
What a Microsoft support scam looks like
A Microsoft support scam uses an unsolicited phone call, or a full-screen browser pop-up, claiming your computer is infected and that "Microsoft" needs to fix it. They pressure you to install remote-access software, then charge a "fix" fee or steal from your bank. An example of the pop-up style is: Windows Defender Alert: your PC is infected and your data is at risk. Do not restart - call Microsoft support immediately to remove the threat.
The call or pop-up is the bait; granting remote access is the real danger. This guide shows the warning signs, how to stay safe, and what to do if you have already let them in.
Why these scams are convincing
An alarming pop-up that fills the screen, a confident caller using technical language, and the Microsoft name together create panic. Once someone is worried about losing their files, they stop questioning and start following instructions.
The fact that protects you: Microsoft does not make unsolicited calls about computer problems, and Microsoft error or warning messages do not include phone numbers to call. Any unexpected "your computer is infected, call this number" message should be treated as a scam.
Signs a Microsoft support contact is a scam
- You get an unsolicited call claiming to be Microsoft, Windows, or a "certified technician".
- A pop-up says your PC is infected and gives a phone number to call.
- You are told not to restart or close the screen.
- You are asked to install remote-access software, such as AnyDesk or TeamViewer.
- You are asked to pay a "fix" fee, buy gift cards, or log in to your bank while they watch.
- The caller already "knows" your computer has a problem.
- They create urgency and discourage you from hanging up.
How the scam works
First, an unsolicited call or pop-up warns that your PC is infected. Second, you are told to call a number or keep the screen open. Third, you are talked into installing remote-access software. Fourth, the scammer shows you fake "errors", then asks for a payment, gift cards, or your banking login. Fifth, with remote access they can install malware, steal files, or move money.
Hanging up, closing the browser, and never granting remote access breaks the chain.
How to stay safe from support scams
Treat any unsolicited "your computer has a problem" contact as a scam.
- Hang up on unsolicited "Microsoft" or "Windows" calls - Microsoft does not cold-call about PC problems.
- Never call a number shown in a pop-up, and never grant remote access to an unexpected caller.
- Close a scary pop-up by shutting the browser or restarting the PC; a genuine Microsoft warning does not tell you to phone a support number.
- Never buy gift cards or log in to your bank because a "technician" tells you to.
- If you need help, contact Microsoft or a technician you found yourself.
If you are unsure whether a linked page is genuine, our guide on Is This Website a Scam? A Practical Checklist Before You Buy helps, and our Windows Tech Support Scam UK: How to Spot and Stop Fake Microsoft Calls and Amazon Scam Phone Calls UK: How to Spot a Fake Amazon Call guides cover related phone and pop-up cons.
If you let them in or paid
If you granted remote access, disconnect the computer from the internet, then run a full security scan or have it checked by a technician you trust. Change your important passwords - email and banking first - from a different, clean device. If you logged in to your bank or shared card details, contact your bank immediately on 159 or the number on your card.
If you paid by card, ask about a chargeback. If you sent money by UK bank transfer on or after 7 October 2024, mandatory APP fraud reimbursement rules may apply to Faster Payments and CHAPS transfers. The PSR rules include a 13-month claim window, reimbursement within 5 business days in many cases, a maximum claim amount of £85,000, possible exclusions, and a possible excess of up to £100. The rules do not cover every payment type or every situation, so report it to your bank as soon as possible.
If you shared personal details, consider Cifas Protective Registration at cifas.org.uk and monitor your credit reports with Experian, Equifax, and TransUnion. Keep the caller's number, any payment details, and the software you were asked to install as evidence.
How to report a Microsoft support scam (UK)
Report a support scam that impersonates Microsoft through Microsoft's official support-scam page at microsoft.com/en-us/concern/scam or reportfraud.microsoft.com. If a phishing message reached you by email, forward it to the NCSC at report@phishing.gov.uk; if by text, forward it to 7726.
If you lost money or shared sensitive information, report it to Report Fraud at reportfraud.police.uk or on 0300 123 2040 if you are in England, Wales, or Northern Ireland. In Scotland, report to Police Scotland on 101. Tell your bank as soon as possible if money moved, and keep the evidence.
Frequently asked questions
Does Microsoft ever call about a problem with my PC?
No. Microsoft does not make unsolicited calls about computer problems, and Microsoft error or warning messages do not include phone numbers to call. Any such call or pop-up is a scam.
A pop-up says my PC is infected and to call a number - is it real?
No. That is a scam pop-up. Do not call the number. Close the browser, or restart the PC if the pop-up will not close, and do not let anyone take remote control.
I granted remote access to my computer - what could they have done?
They may have installed malware, viewed or copied files, or tried to reach your online banking. Disconnect from the internet, run a security scan or get the PC checked, and change your key passwords from a clean device.
I've already paid the scammers - can I get it back?
Possibly. If you paid by card, ask your bank about a chargeback. Eligible UK transfers since 7 October 2024 may fall under APP reimbursement rules, subject to limits and exclusions. Tell your bank immediately.
How do I report a Microsoft support scam?
Report it to Microsoft through microsoft.com/en-us/concern/scam or reportfraud.microsoft.com, then report it to Report Fraud in England, Wales, or Northern Ireland, or to Police Scotland on 101 in Scotland. Tell your bank if money moved.