This should fix the problem. If it dosen't please provide us with the error returned.
1. Restart the computer. Tab or hold down the F8 Key until you enter 'Windows Advanced Configuration' Menu. Select 'Safe mode with command prompt' from the menu and hit enter.
2. You should now see a Command Prompt Window appear on your screen. Type in the following command.
Del C:\folder you want to delete /F
Let's say the folder was on your Desktop and is named, 'ryan.' You can delete it by doing the following on Windows Xp or Nt.
Del %userprofile%/desktop/ryan /F
3. Reboot the system and the folder should be gone!
You shouldn't get any error messages with this method. If you do get an access denied error in dos let us know. For future refrence it's always good to see what is running with your computer if you don't find anything in task manager.
You can do this by using a tool such as regedit or msconfig.