I have a Acer Aspire M5201 64 bit desk top. Windows 8 Pro was put on to it in December and it behaved brilliantly. Since April I started to experience problems with the screen freezing and Ctrl Alt delete wouldn't work. I realised it was following Windows updates or major config that this started to happen. The message I received was no video input. If I changed the leads from my monitor to the machine from DVI to VGA and then switched the machine back on it worked again or if I completely shut down my desk top and disconnected the power and then reconnected it, it would start, however it would hang on start up and then I would have to reboot it again. Yesterday after a major config by windows, the machine, following me closing it down properly wouldn't start. I disconnected the machine from the mains plugged it all back in and it worked but again hangs on start up. It is driving me up the wall. The desk top has been upgraded as it was a 32 bit machine when it came out of the factory. My husband who was all things computers died in Feb but he made sure that the desk top was compatible with Window 8 Pro before he installed it. Can some one please help me because I am fed up of losing all my settings when I disconnect my machine and to be honest I have wasted so much time trying to resolve this problem? The machine in between times once I have got it to work, works fine for about two weeks and then problem persists again. It is really weird but it always seems to happen following a major update. Why?.