Ive had my PC for a YEAR and have always had my mouse and keyboard in the usb PORTS and nothing else,

Since yesterday my mouse would start CUTTING out while playing a game and needs to be taken out and plugged back in to get it working again, after this about 5 mins later both my keyboard and mouse cut out and i get a pop up saying my usb devices have malfunctioned and i need to restart to FIX it.

I thaught this maybe a usb overload but im not sure?

I tried to put my keyboard into the ps2 socket using an adapter and got the bootup error "Ntoskrnl.exe file is missing or corrupt" as soon as i put it back into usb i dont get this error and it boots up but cuts out during games.

Thanks alot for any helpYou didn't mention what OS you are running. Go to CONTROL Panel/System/Hardware/Device Manager and scroll all the way down to the USB devices . Right clik them and select Remove.
You will be greeted with a warning message...ignore it.
Do this for all the USB hubs listed and re-boot the machine.
Windows will now reinstall the USB hubs automatically and you should be good to go.

patio  Robulus:

If Patio's good advice doesn't do the trick, it may be that the actual USB port of your computer is going bad.  Do you have a different port into which you may plug the mouse?

Let us know how it goes,
Doc