Welcome to Vista Forums rajkash. It is very common that SP1 does not install properly via Windows Update. The first thing you need is a modern browser that is supported by the Microsoft website and online installers. I strongly suggest that you install Mozilla Firefox. Then download SP1 from here: https://www.microsoft.com/en-us/download/details.aspx?id=30.
Many software products require SP2, and some no longer support Vista at all. If you restored from a factory image that included a free trial of Norton, then you should download and run Norton Removal Tool. Good luck!