why no body use ShadowUser Pro ? its very strong !! you can try unknown virus without harme you computer its goo to test unkonow files just look ShadowUser Pro insulates your PC from all manner of day-to-day problems. It runs an exact duplicate of your system as a virtual machine, known as ShadowMode. If a software installation goes wrong or a virus hits, you can completely discard the virtual machine. Conversely, if you've successfully installed software or made other important changes, you can write all or part of the virtual machine back to the actual, physical PC's storage. With your system in ShadowMode, you can surf the Internet without a trace of unwanted cookies, histories, temporary files, spam applications, or spyware; instantly undo accidental or malicious changes to your PC; safely test new applications, updates, and patches before saving those changes; use the scheduling and user-security features for securing public-access computers; and reduce system-maintenance costs and computer downtime. Version 2.5 allows a ShadowMode session to persist across reboots. This utility makes an excellent way to safeguard a PC from unwanted changes. ShadowUser Pro makes a carbon copy of your computer so you can delete files, install new programs, and tweak your system settings without worry, as the program will restore your PC to its original state upon the next reboot. If you want to keep changes, you can copy them to your actual machine's hard drive. To test ShadowUser Pro, we engaged in some virtual debauchery by installing adware, visiting adult sites, and deleting important documents. Upon restarting, we found the erased files in their proper places, with no adware and nary a hint of our Web-surfing history. For more protection, you can disable program controls for all users except administrators. The app gives you the flexibility to protect your system without hindering normal work. For instance, you may choose to protect only the system drive. While most home users can benefit from this program, it will be exceptionably suitable for those who maintain publicly used computers. you can see its good And its win the 5 stars in download .com http://www.download.com/i/dl/rate/cnet_rating-5.gif please any body have any advise ?