If you want to reinstall Windows Vista by doing a clear installation probably to reinstate default Windows settings here is how to do it.

1. Turn on your PC and insert Windows Vista DVD or CD.

2. On Install Windows page, follow any commands that might show, and then tick Install now.

3. For newest updates on installation page to assist ensure that a clean installation help PC to protect against security threats. You require an Internet connection to obtain installation updates.

4. On Type your product key for activation page, we suggest that enter the product key to avoid problems throughout activation.

5. On license terms page, if you admit license terms, tick I accept the license terms.

6. Follow the instructions on every page. On which kind of installation do you want? Page, tick Custom.

7. Choose partition where you would like to install Windows on next Page.

8. Tick Next to start installation. You see a compatibility report.

9. Follow the instructions.