Any error msgs? BSOD? Or just freezes with last image on screen? Does it both on battery only and on AC too?
My Acer laptop couldn't start and said could not find windows files. then I reinstalled the windows using a pen drive. Then bootup problem fixed. But laptop is not operating properly. It is getting stuck always. I defragmented the hard drive. For few hours then it worked properly and again facing that problem. Is that surely problem with hard drive?

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