as it a pre built and it was shipped. check the cpu cooler and gpu cooler make sure there on and fan workings rihgt. check that all the ram is seated and the video card is seated. run cpu-z and gpu-z make sure everything read fine. look under device manager for any missing drivers. go to amd web page download the newest motherboard chipset and gpu drivers. check for any bios updates for the mb. try another mouse see if the mouse went bad. try booting into safe mde see if it an app.