Last time I could use my PC it had lots of Windows popups

[Kskrg]

the operating system failed after that, could it be because i unplugged while it was on? are popups a sign of a failing pc?

[WAWood]

@Kskrg 

Depends on WHAT the PC was doing when you unplugged it.  IF it was just sitting idle, that should not have had any serious bad effect.  If it was doing Windows Updates, you essentially TRASHED it.

As to the popups. impossible for us to say from here without knowing exactly what text is contained in each popup.  And even then, it's likely if you're getting to the desktop OK and getting these randomly afterware, that's more likely a sign of malware infection.