1. Open an elevated Command Prompt window. To open an elevated Command Prompt, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
2. Type the following command and press ENTER:
rd /s /q C:\$Recycle.bin
(This clears out the $Recycle.bin folder for the C:\ drive. You may have to do this for each hard disk partition in your system.)
3. Type exit to close the Command Prompt window.
I.T. Tips from fergus.it