Martin,Thanks for the reply!!!!It's a sony vaio,about 2yrs old,came with XP.Was working fine up until about 2wks ago.I deleted alot of software because my c drive was full,d drive has alot of room(2 hard drives)Started moving software to d but,it doesn't work any longer so,I deleted them with the thought of reinstalling on d later.We did have the power flicker several times,then go out.No surge protection either(I know,not smart)It won't let me restore at all!It takes sometimes 6 or 7 times,just to start,it locks up in differant spots.if I can get it past the first few minutes,it's usually works pretty good.I have not installed any new hardware but did add spybot and adaware,got rid of those and didn't help.I'm ready to take it in and I don't give up much.thanks for your help,jim