Windows 8 won't detect shutdown

Various brands / CUSTOM BUILT
July 4, 2015 at 16:25:59
Specs: Windows 7 Professional x64, 3.6GHz 16GB

I've been having a problem with my computer. It's somewhat difficult to explain but I'll give it a shot:

When choosing "Reboot" from the system menu, it does its usual logout and shutdown thing, then the screen goes black. The system never goes on again, and when turning it on manually it will not do the stuff usually needed when rebooting (installation completeions, etc.). Also, running

wmic os get lastbootuptime
in cmd.exe outputs a date that can be somewhere between many hours ago and several days, even though the machine was rebooted just minutes ago. I am running Windows 8.1.

Any explanations?

99 little bugs in the code,
99 little bugs.
Take one down, patch it around,
129 little bugs in the code.

See More: Windows 8 wont detect shutdown

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July 5, 2015 at 03:33:19
"Any explanations?"
Could be anything, lets see what these reveal.

Here are the first 2 steps, there will be more steps needed, after I see the results of these logs.

Run them in this order.

Step 1: Run AdwCleaner
Author's site
Close all open programs and internet browsers.
Double click on AdwCleaner.exe to run the tool.
Click on Clean.
Confirm each time with Ok.
Your computer will be rebooted automatically. A text file will open after the restart.
Please Copy & Paste the contents of that logfile with your next answer.
You can find the logfile at C:\AdwCleaner[S1].txt as well.

Step 2: Run Junkware Removal Tool
Malwarebytes Acquires Junkware Removal Tool
Download Junkware Removal Tool onto your Desktop. If your default download location is not the Desktop, drag it out of it's location onto the Desktop.
Warning! Once the scan is complete JRT will shut down your browser with NO warning.
Shut down your protection software now to avoid potential conflicts.
Temporarily disable your antivirus and any antispyware real time protection before performing a scan.
Click this link to see a list of security programs that should be disabled and how to disable them.
Run the tool by double-clicking it. If you are using Windows Vista or Windows 7/8, right-click JRT and select Run as Administrator.
The tool will open and start scanning your system.
Please be patient as this can take a while to complete depending on your system's specifications.
On completion, a log (JRT.txt) is saved onto your Desktop and will automatically open.
Copy and Paste the contents of the JRT.txt log please.

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