Hi...here are answers to your questions...
What happened before this started? Nothing..everything was normal
What changes did you make, etc? No changes have been made whatsoever
What OS are you using? Windows XP
Does the PC work OK once it's actually on? Yes...maybe I shouldn't turn it off?
And what protection do you have? PCSafe Adware
Finally, welcome to the forums, Radiogirl....THANKS!!!