maybe CPU overheat, touch the metal plates on the cpu fan and
see if it's hot. If it's very hot, go to your BIOS screen to check
the temp, if it goes 70 degree then u may want to rest a little. Or
get a more powerful fan.
If you touch the metal plate, it's not hot, but the BIOS screen
shows it's like 70degree, then your fan is not contacting the CPU
well. Maybe one of the "leg" of the fan loosen, so the heat from
the chip cant conduct to the metal plates, which suppose to absorb
the heat and radiate it out.
If it's not bcos of hardware overheating, then just do all the
virus scan/spyware scan. etc. If still cannot solve the problem,
format and re-install OS.
