In this scam cybercriminals call you and claim to be from Microsoft Tech Support. They offer to help solve your computer problems. Once the crooks have gained your trust, they attempt to steal from you and damage your computer with malicious software including viruses and spyware.
Although law enforcement can trace phone numbers, perpetrators often use pay phones, disposable cellular phones, or stolen cellular phone numbers. It's better to avoid being conned rather than try to repair the damage afterwards.
Treat all unsolicited phone calls with skepticism. Do not provide any personal information.
If you receive an unsolicited call from someone claiming to be from Microsoft Tech Support, hang up. We do not make these kinds of calls.
Report phone scams
Whenever you receive a phone call or see a pop-up window on your PC and feel uncertain whether it is from someone at Microsoft, don’t take the risk. Reach out directly to one of Microsoft technical support experts dedicated to helping you at the Microsoft Answer Desk. Or you can simply call Microsoft at 1-800-426-9400 or one of Microsoft's customer service phone numbers for people located around the world.
Microsoft Phone numbers:
- Australia: (Australia callers) 13 20 58 , (International callers): 612 9870 2200
- Ireland: 1850 940 940
- New Zealand: 64-4-470-6583
- United Kingdom: (+44) 0344 800 2400
- United States: 1-800-426-9400
Source: https://www.microsoft.com/en-us/safety/online-privacy/avoid-phone-scams
(you need to switch your country setting to US/English for following this link)