Go to Start->Run and type in regedit and hit OK. Go to File->Export and save the registry somewhere as a backup. Close the Registry Editor now. Go to Start->Run and type in notepad and hit OK. Then copy and paste the following into Notepad:
REGEDIT4
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\iexplore.exe]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Main]
"XMLlibADutid"=-
"XMLlibBnxt"=-
"XMLlibID"=-
"XMLlibiftid"=-
"XMLlibistid"=-
"XMLlibittid"=-
Save the file as "FixExplorer.reg". Make sure to save it with the quotes. Double click on it and choose Yes to merge it. You may delete the file afterwards.
Restart and set your own background (we resetted to a blue background, so if you want to change it - right click on desktop and go to Properties->Desktop tab).
Any problems now?