Help i relly need help my computer is crazy?

Basic trouble shooting you can do here is check on the heat inside your computer, check on the power supply fan if its working, also check on the processor fan make sure that its turning, if it still has the same problem try to open one sidepanel of you computer and put a desk fan beside it to add colling (this is only temporary). Then go to a computer store and ask how to improve the cooling system inside your computer and buy some additional fans. Some other reasons might be a virus infection so try to run you anti-virus program.