Es könnte vllt daran liegen, dass du beim Herunterfahren die Auslagerungsdateien löschst, was das Herunterfahren extrem verlangsamt

vllt ausstellen, oder deine Programme die gestartet sind, brauchen einfach zu lange um beendet zu werden, dazu ...
hier ein TuT von mir:
Auto-Kill All Programs at Shutdown
This tweak can speed up the process a lot by killing tasks quickly and not requiring user input for closing them, e.g. the repetitive Firefox pop-up asking if you really want to quit. Here it is:
Step 1: Go to “Start,” “Run,” and type regedit.
Step 2: Navigate to:HKEY_CURRENT_USER\Control Panel\Desktop
Step 3: Find the Registry Key called AutoEndTasks and right-click then select Modify. Change the value to 1.
Change Application Hang Time
There are a few Registry Keys that are, by default, set to a ridiculous setting. There are three of them that we are going to cover today called WaitToKillApp, HangAppTime, and WaitToKillServiceTimeout.
WaitToKillApp sets the time for Windows to wait before killing the application you are attempting to close, while HangAppTime sets the hang time for the app before closing, and WaitToKillServiceTimeout sets the time for Windows to wait before killing Microsoft Services.
By shortening these you will, obviously, have a faster application response.
Ready? Let’s do it!
Step 1: Go to “Start,” “Run,” and type regedit.
Step 2: Navigate to:HKEY_CURRENT_USER\Control Panel\Desktop
Step 3: Find the Registry Key labeled
WaitToKillApp, HangAppTime, and WaitToKillServiceTimeout and right-click them, then select Modify. Change the value to 1000.
Disable Clearing of Paging File
We previously talked about the paging article in another article on speeding up Windows, but today we are talking about how to speed up the use of the Paging File even more.
On shutdown, Windows automatically removes the contents of the Paging File for security, because it may run as a temporary file, holding information such as unencrypted passwords, etc. (If you believe the security of your system will be too far out of control due to the absence of removal of such information, then it is not necessary that you use this hack.)
Let’s do it!
Step 1: Go to “Start,” “Run,” and type regedit.
Step 2: Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management.
Step 3: Find the Registry Key labeled ClearPageFileOnShutdown and right-click it, then select Modify. Change the value to 0.
Gegebenenfalls
WaitToKillApp, HangAppTime, and WaitToKillServiceTimeout erstellen und den Wert eintragen

auch solltest du die Autostart Programme checken.
Und hier noch etwas: Direkt dein System mit beiden Prozessoren starten!
- Windows Taste + R drücken -> msconfig eintippen -> Enter
- Registrierkarte Start anklicken -> Erweiterte Optionen -> Hacken bei Prozessoranzahl -> auf 2 setzen oder mehr (jenachdem wie viele du hast) -> Übernehmen und neustarten