windows defender uninstalled my mistakeup

[raczer]

upgraded my xp os to vista home premium. uninstalled windows defender by
mistake. cannot reinstall defender from download page because my computer is
telling me that the defender software came with the vista upgrade. any help?

 

[Mick Murphy]

You can not uninstall it, as it is part of the Vista OS.
How do you know it is not there?

 

[raczer]

I just assumed that it was gone because I'm getting an application failed to
intialized 0x800700002 message

 

[raczer]

Thanks but when I click on the defender icon I get a no program associated
with the file. I's gone

 

[raczer]

Thanks for your input but I still get a no program associated with this file
message when i click on the window defender in the control panel.