Courtesy of AVG:

Description for disabling restore function for Windows XP

Files placed in the _System volume information folder are source files for the system restore function that is available in Windows XP operating system. Files that were healed were moved in their original INFECTED state into this folder and it is necessary to DELETE them by following these steps:

1. Close all open programs. Then right-click My Computer on the Windows desktop

2. Click on Properties

3. Click on the System Restore tab

4. Check Turn off System Restore on all drives

5. Restart the system

6. Go through the first four steps again and uncheck the item mentioned in step 4.

It solved my problem 100%. Hope you have luck!