Computer freeze

mysteryman · 9 Feb 2009 at 22:44

The problem is that my PC keeps freezing randomly maybe good for a half hour or even a few hours but then the screen freezes and the mouse pointer and nothing will move. I've run Memtest for around 4 hours but it doesn't have any errors and I tested the CPU with Prime95 for 3 hours but comes back with no errors. Therefore I don't think its the RAM or CPU. Only ever overclocked my PC once about a year ago but reset everything back to default ages ago. My PC specs are:

Intel Core 2 E6600 2.4GHz
2GB Corsair DDR2 XMS2-6400C4 RAM
Gigabyte GA-965P-DS4 motherboard
ATI Radeon 512MB X1900 graphics card
Tagan TG530-U15 530W ATX2.01 PSU
2x 320GB Seagate Barracuda 7200 SATA-II 16MB cache

Does anyone know what else could be wrong with it? Do you think taking the whole thing apart and putting back together will solve it? Thanks

Dewotter · 9 Feb 2009 at 22:47

What's your operating system?

mysteryman · 9 Feb 2009 at 22:52

Windows Vista. Previously I installed Windows 7 Beta but it kept crashing and giving me a blue screen with the error IRQL Not Less or Equal. So I reverted back to Vista and now the screen just keeps freezing forcing me to restart. It seems as if its ever since I changed operating system thinking about it. Although it was getting slow with Vista previously. Hence all the reformatting and reinstalling.

rodo · 9 Feb 2009 at 22:52

Know very little on this but if using vista have a look in event viewer

95thrifles · 9 Feb 2009 at 22:57

that can refer to either RAM or GPU
RAM manually set freq and voltage in BIOS - although you've ran memtest this is still a good idea
GPU have you got latest drivers? when you last updated did you remove old ones properly? uninstall old drivers, then reboot into safe mode and use ccleaner to remove any traces
Edit: I had this when selecting certain different frequencies for my RAM, some are stable enough to boot into windows and even pass a stress test but can fail when you start gaming or the like

Dewotter · 9 Feb 2009 at 22:57

When the computer freezes, does the hard drive light appear to be on? Even if it doesn't I'd be tempted to run a chkdisk on the volume.

Right-click C: drive>Properties>Tools Tab>Check Now, select both options on the resulting dialogue, when prompted, restart.