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PC screen freezes since nVidia Driver Update
I upgraded from Win 7 Home x64 about 2 weeks ago, everything was dandy. Then nVidia send a new graphics driver which I tried to install, but the screen just went black, I left it for 30 mins but then I had to power off. I restarted and the BIOs proceeded normally then the windows load screen but adter that just a mouse pointer with 2 intermittently flashing little blue circles. I left that for a while but it was going nowhere. So I swithed away from my 780Ti and booted using the integrated graphics, I tried rolling back the nVidia driver but the whole PC became unresponsive.
After restarting it seems some driver reinstalled because the 780Ti is working again, but shortly after boot to desktop when the PC is lef idle, the screen freezes and its impossible to get any response from the PC.
I dont want to install nVidia drivers again in case it makes the situation worse, any troubleshooting help?