Since installing Win 7 32 bit professional I have been having problems with waking my pc up from sleep mode. If I put the pc into sleep mode & press the power button (which I have always done)to boot the pc it will not boot up. I have found the only way to start it is to switch the power off on the switch to the power supply, press the power button & then switch it back on again at the power supply, then it will boot up. I have a Asus P5B MB, with the latest BIOS & a Intel Core duo 2, 8mb memory. Any help would be appreciated.