USAFRet, I think, is spot on. This sounds an awful lot like one of the many scams to trick users into paying for support that is really not needed.
Check Control Panel/System to see if Windows is activated or not. Also, a complete malware scan with a tool like Malwarebytes should remove this problem (if what we suspect it is is accurate).
Get Malwarebytes at www.malwarebytes.org. Install, update, and run a full scan (the free version is good). Delete all the app finds.