1: Click on start and type "regedit" in the Search Bar.
2: Run regedit.
3: Click on "HKEY_CURRENT_USER".
4: Click on "Software".
5: Click on "Microsoft".
6: Click on "Windows".
7: Click on "DWM"
8: Right-click in the blank space in the right part of the window.
9: Select "New".
10: Select "DWORD (32-bit) Value".
11: Name it "UseMachineCheck".
12: Select "New".
13: Select "DWORD (32-bit) Value".
14: Name it "Blur".
15: Select "New".
16: Select "DWORD (32-bit) Value".
17: Name it "Animations".
18: Close regedit.
19: Click on Start menu and type "CMD" in the Search Bar.
20: Right-click on it and select "Run as Administrator".
21: Type "Net Stop uxsms".
22: Wait for it to finish, then type "Net Start uxsms".
23: Windows Aero should now be Activated/Re-Activated.