System randomly locks up then unlocks

[Linguica]

Ive tried to figure this out but the issue is escaping me so ive come for some possible help or ideas as to what the problem is.

Ok so my computer will randomly start locking up on me while im on the web, listening to music, watching movies...whatever. It will completly freeze up for 5 to 30 seconds, mouse wont move cant type anything and if there is sound (music/movie) I get this weird echo-ie/robot sound. After a bit it will unfreeze and all will go back to normal for a few minutes and then it will freeze again. This will go on and on untill i manually reset the system. If I restart from the start menu windows will exit to the shut down screen and just sit there. I left it over night once and it was still there in the morning.

Ive Run CCleaner, MBAM, Super Anti Spyware and a fully updated version of Avast. No virus was found and I removed some addware, but thats it. I ran Windows Disk check (error check) and the HDD is fine, im at a loss.

Anyone have any Ideas?

Thanks in advance
Dave

[Aldersan]

Check your drivers maybe?

[Linguica]

video drivers are up to date...