Microsoft (drivers?) or other does this. Given you've tried the usual and checked all the BIOS settings and more, you use System Restore to a day before it worked and hope to avoid starting over.
Using Vista, and the power button was setup on this Lenovo 3000 desktop was setup from the factory to sleep. Pressing the mouse button would wake the computer up.
This has worked since they got the computer, now all of a sudden the computer will not sleep. I have read as much as I could find so far and changed the settings, especially the media setting, but nothing works, this just happened, and of course they say they did not d/l anything or change any settings!
Thanks for the help!