This is a common problem.
I have seen this myself on my machine.
[[Are you sure you want to delete WINDOWS?]]
Makes you stop and think when you see that message, doesn't it? ;-)
You probably have a damaged/corrupted file in the Recycle Bin.
Run Error Checking | Reboot | Try to empty the Recycle Bin again.
1. In My Computer or Windows Explorer, right-click the volume you want to
check, and then click Properties.
2. On the Tools tab, click Check Now.
3. Select both of these:
* Automatically fix file system errors
* Scan for and attempt recovery of bad sectors
A message will popup.
[[The disk check could not be performed because the disk check utility needs
exclusive access to some Windows files on the disk. These files can be
accessed only by restarting Windows. Do you want to schedule this disk check
to occur the next time you restart the computer?]]
Click YES.
You have to reboot for Error-checking to run.
Then reboot.
For a peek at the chkdisk log.
Start | Run | Type: eventvwr | OK
Look in Application | Listed as Information
under Winlogon, Event 1001
Additional info here >>
Visit here...
http://www.kellys-korner-xp.com/xp_qr.htm
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Recycle Bin - Deleting Problems