last week,I received a virus named KillDisk. I wanted to know whether the Appdefend could protect my computer from this dangeous virus. Finally, Appdefend failed... I had to redistribute my harddisk , all my data in the disk is gone... I test the virus again in a virtual machine (VM Ware),I run the virus under the sandboxie. The sandboxie can't prevent it either... is there any software except antivirus software can prevent it from demolishing my system? Thanks a lot.