To Enable System Restore Point in Vista do the following -:
1. Click on the START >> Control Panel >> System and Maintenance >> System menu option.
2. then Click on System Protection in the left-hand task list.
3. Put a checkmark in the checkboxes next to each hard drive listed under the Create restore points automatically on the selected disks: section.
4. then Click on Apply And OK .
After that the System Restore Point is now Enabled on your computer.
Thanks dude this is realy worked for me !!!!!!
Thanks again... also the toms hardware Forum..