Uninstall Vista SP2
How to Uninstall Vista SP2
Try this method to uninstall vista SP2
↣ Click On Start Menu >> In the Start Search box
↣ Type appwiz.cpl & then press ENTER
↣ Click View installed updates >> Click Service Pack for Microsoft Windows
↣ & then click Uninstall
↣ Please Follow the instructions to complete the uninstall process
Uninstall Vista SP2
How to Uninstall Vista SP2