My computer has been freezing and i dont fully know why. When it freezes it leaves the screen how it is, no blue or black screen. It seems to happen randomly and something i notice is that my USB ports lose power and then it freezes. I'll see that my USB network adapter stops flashing and i lose connection, then my keyboard will turn off and then my mouse will stop working, then my PC will freeze. I have made sure my video card drivers are up to date, and i downloaded the USB 3.0 drivers for my motherboard and its still happening. I am on Windows 7 64-bit.