System Revert can protect the whole system or just selected drives from being permanently changed. During the course of normal activity, users and programs can perform actions which affect the hard disk. Rollback an operating system to an original state by just rebooting.

System Revert can run your system in a virtual enviroment and redirect information being written to the hard drive, leaving the original data intact.
System Revert can also protect a computer against viruses and malware programs. Although it does not provide traditional antimalware protection, it removes malware and all changes made by them on protected drives at system reboot.
System Revert discards any modifications made on protected drives and returns the protected drives to a pre-defined state at each restart.
System Revert Features:
1. Prevent changes made by all viruses and malwares.
2. Install and try any software without affecting your system.
3. Mount special virtual drive to view original state of a protected drive.
4. Rollback your system to original state by just reboot.

Please Note: this program can't support Windows 7 (64bits)

The license of this software is Free Trial Software, the price is $30.00, you can free download and get a free trial.