sir in my sistam hade instoled norton antivirus but properly not working one of file missing that navce msi pleas how kene solve this problme

What specific Norton product are you using?

Uninstalling and reinstalling is described in the following:

Removing and reinstalling your Norton product

There is also a specific Removal Tool if needed here:

ftp://ftp.symantec.com/public/englis...moval_Tool.exe