Hi there, I've had this problem before, but it reoccurred just now so thought I'd finally try and find out what it is.
At 1am my PC switches from Aero to Basic, then within 3 minutes switches back. I did update my graphics drivers
today, but as I say it used to happen pretty frequently.
Pretty sure nothing intensive is running, I have a HD4870 1gb, 8gb ram and a 965 x4 processor with nothing running that isn't for any other hour of the day.
Since its now one form of daylight saving time, I guess it would actually be swapping at midnight GMT.
Any thoughts as to what may cause this?