Windows XP Service Pack 3 Removal Using System Restore Open System Restore. From the Microsoft® Windows® XP default Start menu, point to All Programs, Accessories, System Tools, and then click System Restore. From the classic Start menu, point to Programs, Accessories, System Tools, and then click System Restore. In the System Restore dialog box, click Restore my computer to an earlier time, and then click Next. View Picture In the System Restore dialog box, select a day and time from the list that says Installed Windows XP Service Pack 3, and then click Next. View Picture Close any open programs, and then in the System Restore dialog box, click Next. View Picture Files are restored. View Picture After the computer returns to Windows, in the System Restore dialog box, click OK. View Picture Removal is complete.