When I turn on the computer to the login screen. Its froze, when I move my mouse to the typing password area and click its its start froze. But sometime they lets me login in. Then about 5-10mins later its froze me,(but sometime its froze before I can get to my windown to use its.) I can move my mouse but can't click on anything or turn off power, the only way for me to turn off power is the power button. When I turn its back on.. its said, " checking file system on C, the type of the file system is NTFS, Volume label HP." after its run still have a same problem. This all start when I leave my computer on for like 2 hrs after I recover my computer to the original.

I using Hp windown vista destop
HP Pavilion a6412p PC

*** help me!
Thanks

May b you have bad sectors in your hard disk or try to use Disk defragmenter in system tools.

Or Scandisk with repair bad sector option checked.

Format your/ system it may be attacked by virus install a fresh operating system and before all install antivirus.

I would install a new hdd