Random System freezing

[Impulse Fire911]

So this weekend ive been getting random system freezings like i will be on chrome or firefox and about to change th URL to youtube or something and then the browser stops working, go to desktop manager, stops working too, eventually nothing responds and i cant click on anything.
This happened this morning as well, im worried because i dont know what is causing it.
ive virus checked like 5 times, done a mem scan, hard drive scan, cpu seems to be working fine..
any ideas as to what is causing this?

 

[richc46]

Go to event viewer and look for errors
Go to device manager make sure that all drivers are up to date and no warning markers are present
Oveheating?
Test with malwarbytes. Download and update, then run a full scan

http://www.sevenforums.com/crashes-debugging/120940-windows-7-freezes-up.html#post1040730

 

[Impulse Fire911]

ive gone to event viewer and sadly nothing shows up as wrong, all my drivers are up to date too, my pc stays at 26C. but ill try malwareytes i guess

 

[richc46]

http://www.sevenforums.com/crashes-debugging/120940-windows-7-freezes-up.html#post1040730

 

[Impulse Fire911]

yea was just reading that,
psu is fine its never been a problem.
Ive safe booted and clean booted, worked fine, this isnt a very often occurance, only once in a while. usually happens after i turn the pc from sleep mode