Server 2012 user stuck images on desktop

I have a windows 2012 environment. User is on a windows 7 client(dual monitors) . The users continues to report stuck images on the desktop. She also indicates that there strips of previously closed windows. I have attempted to resolve this problem by:

-Switch out computer
-Changed out monitors and cables
-Removed windows animation
-Tried Microsoft Patch

Unfortunately we keep experiencing this problem.
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Most likely it is an app running on the system causing the problem:

1.  Does it happen in safe mode?
2.  Change the resolution of the screen?
3.  Change the color depth to 16 from 32?
4.  Is it a particular app or apps that always seem to leave pieces behind.
5.  Any missing or unknown devices in device manager?
6.  Tried latest video drivers from manufacturer of the PC? If so have you tried the general driver from the video care manufacturer?
7.  Change the computer properties->performance to "Adjust for best performance"?
8.  Disabled Aero?
9.  Use msconfig and disable all startup items?

Those are my first thoughts off the top of my head.

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Scot HalvorsenCommented:
How does the Windows 2012 apply to this situation? Are you using remote desktop to access it from the Win7 system?
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Windows Server 2012

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