Earlier today I received a full screen fake alert claiming to be from Microsoft, which I couldn't shut down for a while:
Incorrectly claimed that my software was pirated. It is not, it was activated on the phone by Microsoft.
"This computer is blocked" "Do not close this window and restart your computer" "Your computer's registration key is blocked"
Told me to call a given number.
Run a Malwarebytes long scan (including rootkits) - "No malware found"
But something has been done to my computer.
I just had a "The system has recovered from a serious error" notification after turning off and restarting my computer (please see attachment).
Believe it blue screened and restarted while I was out of the room.
Please help me. I need this computer. I cannot upgrade the operating system.
XP SP3 / Avast Free Antivirus / CryptoPrevent