OK. I booted up my computer this morning, and was checking some of the usual things msn, email, facebook ect... I needed to edit a photo in photoshop, but then this thing popped up about scratch disk are full, so i closed firefox and tried again, it still didnt work so then i checked my performance tab have a look cause i don't know what's wrong, it might be a hard drive memory prob but still i bet theres something wrong with my memory anyway.

memtest86+

download, burn, boot from the disk, test!

something else you could  do is find a program that can check the S.M.A.R.T. status of your hdd's. SpeedFan can do this as well as  monitor your temps and fan RPM's. its good  to have a copy of it anyway. once its installed  go to the S.M.A.R.T. tab, select your drive from the dropdown lits at the top and it will tell you how healthy the selected hard drive is as well as its performance.

PSPkiller Wrote:memtest86+

download, burn, boot from the disk, test!

something else you could  do is find a program that can check the S.M.A.R.T. status of your hdd's. SpeedFan can do this as well as  monitor your temps and fan RPM's. its good  to have a copy of it anyway. once its installed  go to the S.M.A.R.T. tab, select your drive from the dropdown lits at the top and it will tell you how healthy the selected hard drive is as well as its performance.

thanks for the info

also, far easier and quick,  and possibly just as effective:

turn off your pc (Finish reading this first), take out all your  ram sticks, wipe down the contacts with a microfibre cloth (earth it against the pc case first) and blow  into the ram slots on your motherboard, preferrably with an airdusterbut if not your lungs will have to do. just make sure you give any condensation a  chance to clear before  turning the pc back on. put the ramsticks  back in making sure theyre  seated properly.

also, check all your drive cables. if  you use SATA drives and theyre older than a couple  of years they might not have  a cable retention clip. they rely on friction to hold them in place. mine need checking every few weeks because they  start coming loose. if that doesn't help try swapping the cables for different ones.

one other  thing, what kind of state is  your PSU in? is it powerful enough? because a failing or marginal PSU can cause all kinds of problems... I've been there...