Sleep mode messes up computer

[Haruko]

In a recent development, if the computer goes into sleep most, it almost always will not "start" again (this problem never occurs if the computer is shut down instead). What I mean by the computer not starting is that when taken out of sleep mode it gives every indication that it is on again (noise and lights)... except for activity from the hard drive (indicated by red light flashing in front of the tower). Also, the monitor tells me that no signal is detected.

The only option seems to be a restart, but whether I hold down the power button until restart is triggered, or turn it off any other way, the result is the same: The computer seems to be restarting normally until it gets to the "Starting Windows" screen, which instead will say "Resuming Windows." Whatever programs were open will still be open, but the computer will run abysmally slow and be nearly unresponsive. It will take a while but I will be able to shut down the computer normally, then upon reboot wait for error checking to finish. After that, the computer works fine again.

Is this a hard drive problem? Any idea what newbish thing I must have done to cause the sleep mode problem, or in any case what the cause may be?

[Haruko]

Answer found: http://xenforo.com/community/threads/sl ... ost-364797

Had to switch S3 to S1 under power management for BIOS settings. Apparent interference of BIOS with Windows 7.