i think i found a solution to this problem..well it worked for me
i went here:http://www.vistax64.com/tutorials/107383-d...ent-change.html
and under "METHOD TWO:
Through the registry"
you will see:STEP TWO:
3. To Enable Changing the Wallpaper - Enable_Changing_Wallpaper.reg < Click To Download
then follow the directions which are:
Click on Save, and save the file to the Desktop.
Right click the .reg (On Desktop) file and click Merge.
i didnt have to do this steps but you might:
(Click on the Run button for Security Warning pop-up.
Click on Continue (UAC), Yes, and then OK when prompted.)
When done, you can delete the .reg file (On Desktop).
i restarted and tah-dah!!!!