Computer freezes suddenly for few seconds

in_core

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From few months I have noticed that my computer suddenly freezes for few seconds ranging from 5secs to 30secs. This freezes happen randomly but i noticed more freezes while watching movie.
I turned on the windows task manager and started watching video and when it freeze again i noticed my CPU usage jumped to 100%, RAM usage stayed stable (my usual CPU usage is below 10% and RAM is about 25%)

I also get black screens (about once per 2 days) followed by windows warning "Display Driver stopped working and now has recovered"

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Hardware:
CPU: i5 2300, Mobo: Gigabyte H67MA-D2H, RAM: 4GB DDR3, GPU: ATi 5850, HDD: 1TB 7200RPM Samsung SATA

Software:
I use Windows 7 Ultimate 64Bit edition
ATi Catalyst 11.7
 

in_core

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Bro i did not understand what u said........please explain
 

in_core

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"prime, furmark, memtest" i have heard about these tests...but is it a software or web based test? nd where to find these softwares?
i dont think it is a problem with the PSU because i have a XFX 650W PSU
 

in_core

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i ran the furmark and prime95 test..........Furmark gives me a score and prime95 test just goes on, so i stopped it manually
what to do now?
 

dontknownotsure

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I mean install or run another OS from live cd or something and watch movie/ playgame in it to verify that its indeed a hardware issue.

anyways if you can download process explorer and try to identify which process uses too much cpu and HDD causing the lock up.
 

in_core

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I formatted my C drive and Reinstalled Win7 again....and the problem is gone :D...thnx God...i was really worried....hope it will never happen again
 

dontknownotsure

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well congrats lol, since its working now i suggest you image your HDD for backup in case you messed it up again in the future so that you wont waste time reinstalling everything.
 

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