Windows 7: Win 7 64Bit not going to sleep all the time.

Good point, I missed that one!

If I uncheck "allow this device to wake computer" for the keyboard/mouse. How will I wake the computer? I usually press the space key to wake the computer. I'll disable the media sharing option as I don't use it. I'll also check to see what setting WOL is on. I do not have any external hard drives.

I'll change each option one at a time so I can reply with what ever was causing this.

You'll have to press the power button to switch back on.
It may not be the Keyboard or Mouse to blame but worth trying each one just to find out which is causing the problem.

After running the power troubleshooter, and shutting off screensaver I left the computer overnight. The monitors were off but the comp was still running.
I just changed media sharing to "allow the computer to sleep".
Lets see if that has an effect. I did click on Windows Media Center when I meant to click on Windows Media Player. I never use Media Center, maybe that is searching for media from time to time.

I don't use Windows Media Player or Centre. Didn't like the way WMP handles album art files. I've uninstalled them through control panel so the media sharing option disappears.

I use XBMC and MediaMonkey.

After changing media sharing and leaving the computer, it did not sleep.
It will no longer sleep when I click Sleep from the Shut down menu.

Open a command prompt and enter:

powercfg lastwake

This will tell you what woke your computer. i htink it might also give some clues as to what is keeping it from sleeping.

From an elevated security command prompt, you can try:

powercfg -energy -output "<full path>Energy_Report.html"

This information, again, may help you identify the culprit.

In my experience, I never have problems forcing the computer to sleep, however, it sometime will not go into sleep on its own. I have been suspicious of MediaMonkey, but I cannot state with certainty that it is the cause.

Go to use the computer this morning, did not sleep. Ran power troubleshooter and it said the screensaver was turned on again. Last time I checked, screensaver was set to none.

From powercfg lastwake I get

Wake History Count - 1
Wake History [0]
Type: Device
Instance Path: USB\VID_045E&PID_0745\5&1603bf0b&0&2
Friendly Name:
Description: USB Composite Device
Manufacturer: <Standard USB Host Controller>

I did the second one and I'm trying to find the file. There are 8 errors, 1 Warning and 19 Informational.

I had a thumb drive in the computer, would that have caused it this time? This was the only time. The rest of the times it wouldn't sleep, there was no thumb drive.

Try googling the instance path value - that might help you identify the specific device.

Google finds nothing. I now have sleep set to 3 min for displays and 5 min for comp.

Found the html file. Typing the command with <full path> the file was not there. So I left it out.

There are:
USB Suspend:USB Device not Entering Suspend

Platform Power Management Capabilities:System firmware (BIOS) does not support S3. (BIOS is set to default except for fan speeds)

Platform Power Management Capabilities:PCI Express Active-State Power Management (ASPM) Disabled

Power Policy:802.11 Radio Power Policy is Maximum Performance (Plugged In) (I do not have any wireless adapters in my comp)

Those are the errors and warnings.