microsoft.public.windowsxp.security_admin

I have just upgraded from XP home to XP professional as I wanted to use
remote access.

After using the 'quick upgrade' I have 3 serious issues, with IE, security
and windows installer.

I went to the microsoft site to look for updates - the site scanned my
software, and downloaded windows installer 3.1 Every time I try to install
this update it fails, and now I have the update icon sitting in my taskbar.
It also wants to install it every time I turn off my PC.

Any suggestions please?
--
Andrew McC