Use Windows Group Policies to stop known Worms and Trojans from running   IMPORTANT NOTE:  Never assume the directory structures exist in your system as written in the document.  Never blindly follow security instructions -- read, review, compare, apply as it fits your system. You can use Microsoft Windows group policy to protect your server from known viruses that require an executable to run. Sobig.F and Blaster are two examples. Click on Start, Run. Type MMC to open the Microsoft Management Console. Select File, Add/Remove Snap-in, Add, Group Policy Object Editor, Add, Close, Ok. Navigate to Local Computer Policy, User Configuration, Administrative Templates, System. Click on Systems on the left hand pane. You should get some choices in the right hand pane. Double Click on "Don't Run Specified Windows Applications". Select Enable and then click on Show, then Add Add any applications you want to restrict. Blaster and Sobig.F are WINPPR32.EXE MSBLASTER.EXE Click OK and close out of the MMC. You are now protected from these two Trojan / worms. IMPORTANT NOTE:  This document and all linked document is being provided as a good will gesture to the Parallels H-Sphere community and to others who may benefit from its use.  Dynamic Net, Inc. makes no representations implied or explicit as to their value or warranty. Dynamic Net, Inc. will not be held liable for any damage resulting in the application of the steps and procedures noted.  If you feel uncomfortable at all about doing any of the steps, make a complete system backup and hire a third party like We Manage Servers to do the work for you.