Delete temp tmp files on shutdown

Code:

cleanmgr /sageset 1

Now open

Code:

gpedit.msc

Navigate to User Configuration > Windows Settings > Scripts (Logon / Logoff) and double-click on Logoff.

Click on Add and Browse in the next window. Right-click in the blank space of the Logoff folder and create a new text document. Name it cleanup.cmd. Open it with a right-click and add the following line to it.

Code:

cleanmgr /sagerun 1

Select the file cleanup.cmd and click Open and in the previous menu OK. The file that you created should be now in the list. Click on Apply and OK afterwards. Et Voila, we are done.
All items that you selected during the configuration phase will now be deleted on every system shutdown.



http://www.ghacks.net/2007/10/28/clear-temporary-files-during-system-shutdown/