I experienced the same issue, but this resolved it for me.
Go to regedit > HKEY_Current_User > Software > Microsoft > Windows > DWM
Once in DWM, right click a blank area within it and create two new DWORD (32) as named below.
Blur
Animations
Once these are added, right click them and click modify to ensure the value is set to 0. Afterwards, open cmd (command prompt) as administrator. - Windows 7 users can quickly open as administrator by typing cmd in the search box within the start menu and then Shift + Right click the command promt > Open as administrator
net stop uxsms
net start uxsms
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Once those are done, open the start menu and right click computer > Properties,
Go to Advanced System Settings. Under the advanced tab, click Settings under Performance. Change the default to Custom, and then hit apply and okay.
You may need to uncheck one list item to hit apply, but recheck it after hitting apply the first time and then recheck the list item again and hit apply. This will keep the computer from changing it from Custom to "Let windows choose what's best for my computer".
This will fix the issue. Sounds like a lot to do but it really isn't and is easy.