Computer won't turn off after shutdown or complete the restart process - Windows 7


As the title says. This problem has happened before. Anytime I try to shutdown the computer, it won't turn off the power automatically like normal. The shutdown process completes, but the power remains on. The only way to turn it off is with the power button.

The same happens when I try to restart. After the shutdown process completes, the screen goes blank, but it won't actually start again. I have to turn off the power manually and then back on.

Like I mentioned, this happened before. The problem ended up being an issue with the CD/DVD drive not actually powering off. This caused the rest of the computer to remain powered on. The fix included editing a value in the registry. I can't remember the fix. I've been searching everywhere for about an hour now and can't find the fix.

Can anyone point me in the right direction?

Thanks in advance!

just for clarification, the fix isn't:

"You need to clean up the registry. There is a particular entry that forces the rig to flush everything and shutdown completely. Most probably, that registry entry has either got modified while installing a program or then it has been deleted.
"In most cases, automatically shutting down can be fixed by installing the motherboard drivers (if not done already). If your computer still doesn't shut down correctly, try this registry tweak. Change the value PowerdownAfterShutdown to 1 in the following key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon""

I tried that, it doesn't work. The fix I remember using that worked before was editing something in the registry specifically allowing the DVD drive to turn off during the shutdown process.
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