Emptying all users' temp folders

Hello everyone

          Right now we're having problem with low disk space on Terminal Server. Actually we have applications which help us to get rid of all temp files easily, I mean without going to C:\Users\USERNAME\AppData\Local\Temp and deleting files manually These are

1. Profiles Scanner 
2. ICSweep

          But these applications cannot remove any item just because I do not have permission to Edit this folder inspite of fact I’m belonging to Domain Admins group. I can break security of a userfolder, but it is quite time consuming. There're about 700+ userfolders in  C:\Users\ folder. Moreover, we have a lots of trojan name "DWH****" (**** is random number, like 3D25, 5C68). And this file seems duplicate itself into different name and that's why we have low disk space error on our Terminal Server.

          So my question is How do I empty C:\Users\USERNAME\AppData\Local\Temp folder without changing the security on userfolders? I tried to empty through GPO (Computer Configuration > Windows Settings > Folders) but I couldn’t get this work.

          Thanks in advance