[I top-post and so did you for a while.]
You originally said Netscape wouldn't open. Has something changed?
What error message referencing Explorer do you get when trying to go to
Add/Remove Programs?
Your AV app should always be disabled and all other apps closed before
installing or uninstalling anything, yes.
I don't care if you've seen this before: Check your system for "hijackware".
Dealing with Hijackware
http://mvps.org/winhelp2002/unwanted.htm
http://www.mvps.org/inetexplorer/Darnit.htm#tshoot
http://aumha.org/a/parasite.htm
CoolWebSearch Chronicles
http://www.merijn.org/cwschronicles.html
Important: You *must* seek updates for Ad-Aware, Spybot, etc., before each
and every use, even "right out of the box". But even they can't catch
everything, 24/7. When all else fails, HijackThis
(
http://www.merijn.org/files/hijackthis.zip) is the preferred tool to use.
It will help you to both identify and remove any hijackware/spyware. **Post
your files to
http://forums.spywareinfo.com/ or the HijackThis Logs forum at
http://forum.aumha.org/ for expert analysis, not here.**
Also update your virus definitions and then run a full system scan. From
now on, do both daily.
[Many anti-spyware sites continue to suffer from a week-long DoS attack.
Alternative download pages for Ad-Aware, Spybot, HijackThis and CWShredder
may be found on this page:
http://aumha.org/a/parasite.htm.]
So How Did I Get Infected Anyway?
http://boards.cexx.org/viewtopic.php?t=957