I've been getting updates on this system for many years.
It has never been infected with malware to my knowledge. I run Malwarebytes, Spyblaster, Kaspersky Total Security, CCleaner
It is not a pirated version of Windows 7 Pro. I'm not computer savvy enough to know how to even get one, never mind installing a pirated version.
It was never part of a corporation. Strictly Home Computer.
I have the original Windows 7 Pro CD from which I installed it.
I have no idea how to do reinstall clean the OS.
Thank you for your response.