Follow these steps to enable Desktop Windows Manager:
1. Click the
(Start) in the bottom left-hand corner of your screen.
2. Type in: services
into the Start Search textbox. If prompted by the UAC, provide a password or confirmation. Click Continue.
3. Scroll down until you locate the entry that is labeled: “Desktop Window Manager Session Manager
4. Right-click on this service. Select Start from the context menu.
5. Right click once again on the entry. Select Properties from the context menu.
6. Go to the “General tab.” Change the Start up Type to "Enabled." Click OK.
Let us know if its working now.