See the suggestion below......it worked for me.
I figured out the solution to this problem in Windows 7. I assume this will work with other OS too.
1. Right-click on the drive that is causing the problem.
2. Left-click on Properties.
3. Click on the Security tab.
4. In the first window click on Administrators (your computer name-PC Administrators).
5. Just below the window click on Edit.
6. Click on Administrators (your computer name-PC Administrators) again.
7. Here's the key to making it work. If Apply is grayed-out, check a box in the Deny column. It will then bring up Apply.
8. Check a box in the Allow column. It should check all of the boxes except the last one and uncheck all of the boxes in the Deny column.
9. Click Apply. It should run a scan of the files in the drive. When the scan is finished, click Ok. The first box should still be open.
10. In the first window, click on Users (your computer name-PC\Users) and repeat steps 5-9, of course clicking on Users (your computer name-PC\Users)
instead of Administrators (your computer name-PC Administrators).
NOTE: You may not have to click in the Deny column after the first scan is completed for step 10 as indicated in step 7.