Seven locks up after idle/overnight

@Ravanx: If the problem you have with both XP & Win 7 then probably you have some hardware problem. The 1st thing I would do is get memtest86 to test your RAM if they're all good, if memtest pass then next thing is to get everest software to see if your CPU is overheated. There's other things that would cause your system to freeze but try those 2 first.

I can't find the original page on which I found this, but a MS Rep advised the following and its finally what worked for me:

Go to Device Manager
Expand USB Controllers
Go to Properties of each USB Root Hub
Go to Power Management tab and UNcheck all options
Click OK
Do this for all USB Root Hubs
Reboot
And breathe a sigh of relief

Worked for me.

-bd47