Started to develop a fault with the computer just before christmas where the mouse would freeze and computer would lock so only way to recover was switch the power off, pc would work a couple of hours maybe longer then mouse freezes. Another glitch developed where screen went blank so had a look at the video card and noticed that a coupleof drips of cooling fluid had seeped onto card so replaced card with a new one and everything seemed ok then back to mouse freezing, I then decided to change the mouse its a usb connection not ps2 and again still not working right, now if I change the video card and put it into another slot sometimes there is no boot at all just a long beep followed by 3 short on the bios startup, I then used another slot and all seemed fine started to do a backup and again everything locked, I'm running windows 7 pro on asus striker II extreme with a Q9650 processor overclocked to 4Ghz with 3 x2ghz of ballistix tracer, I did a mem86 test on the ram, I just did the once over pass as it seems to find fault with ram instantly so assume ram is ok, tested each stick individually, but in the same slot, so possibly I could check in the other slots indivdually to double check, I have also run pc at default clock speeds to make sure it was not the overclocking, highest temp was 57c so dont think its too hot, my gut feeling is that some of the cooling fluid that dripped onto video card is the root to the problem and possibly shorted in the slot although not sure why it starts ok and then a few hours or could be minutes it locks, the confusing bit is if I changed video slots it does the same so could I be wrong, I restored to 3 months ago seemed ok then locked so confused on the matter, could it be a software update so not sure what next to do other than to start disabling peripherals to illiminate hardware problems and see if the problem occurs on bare minimum hardware. Any thoughts and help highly appreciated, has anyone else had this problem.