> Computer freezes randomly, mouse will not move...
Hard drive fails itself, the drive is either having a defective needle or sector it will be stuck on... this drive needs to be replaced before it stucks completely, it is recommended to do a back up as soon as possible and then check the drive with a testing program to look for bad sectors
> Computer keeps booting with system check up...
Disk has many bad sectors, needle is either defective and making scratches on the drive, or is not in a decent quality anymore, windows will replace your faulty sectors and try to repair... however, it is best to back up and plan for a newer hard drive. as this drive may fail completely and you may have lost your data, this can also be tested with a testing program.
> Bluescreens "fault in non paged area"
Usually these bluescreens appoint one or more bad memory modules, you can check this with a memtester and see if you get errors... if you do get errors and have more then one slots occupied, test one by one and see if it works by then
> Boot, but no screen
This also can be a common memory issue... as when the PC boots, the first possible data gets sent from bios to memory to provide image to your monitor, in this case you will have to replace this memory with Modules that you are sure that are working... as this usually means all modules are dead.
> Blurry screen/floating pixels
Graphics card... your graphics card may be getting too hot and may need more cooling, also check the capacitors of the card, these may be damaged, if this is an active cooling... try to see if it is dusty, if it is, blow it out, if this is passive cooling, please consult your technician.
> Green dots on screen in movies/Black area
Usual graphics card failure oncoming. check the capacitors of the card, also try and see if your connector is plugged in correctly if you have not used the screws on the connector
> PC boots but long beep and two short
This is usually the sign of a dead graphics card... if this computer has an onboard graphics card, your mainboard may be dead as well, although, you can try with an add-on video card, if you are already using a addon card, you may be able to use your onboard graphics card that is attached to the mainboard.
> Random shutdown when playing games/ working at computer... restarts after shut down all most instantly
Overheating problem. check your cooling, replace cooling paste or check your overclock settings if you have overclocked your CPU
> PC does not boot at all.
Try a new powersupply, this may be the defective product.
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