I wish to get rid of the POPNAV TROJAN HORSE VIRUS but can't.My AVG
antivirus misses it when detecting and then my Google search engine is
replaced by the POPNAV search engine. I want to know how to get rid of
the POPNAV search engine trojan horse virus and leave my Address bar
set to Google.com ? It changes without me doing anything ! My Freedom
has been taken from me !

Hi nacker,

You can try HouseCall first, a good online virus scan:

http://housecall.trendmicro.com/

However, I think you will need to go a few steps further:

Dealing with Unwanted Spyware and Parasites:
"How To: Safely removing these Parasites from your system:

1) Ad-Aware: 
http://www.lavasoftusa.com/support/download/
Forum: http://www.lavasoftsupport.com/

2) SpyBot 1.2: 
http://download.com.com/3000-2144-10122137.html
How To: http://www.tomcoyote.org/SPYBOT/
Forum: http://www.net-integration.net/cgi-bin/forums/ikonboard.cgi

(after using one of the above)
Go to: http://www.tomcoyote.org/hjt/
Download "Hijack This!" [freeware]

Dealing with Unwanted Spyware and Parasites: HijackThis:
"Editors Note: Since HijackThis does not (yet) come with a install
routine, create a folder via Windows Explorer for HijackThis, then
move the zip file to this folder. This way any backups created are
saved in a legit folder. I've seen too many instances where the user
runs HijackThis from a temp folder and any backups are lost if that
temp folder is cleaned out. You should also make sure you are using
the latest version each and every time you run HijackThis, as there
are new detection added all the time.
- Unzip, double-click "HijackThis.exe" and Press "Scan".
- When the scan is finished, the "Scan" button will change into a
"Save   Log" button.
- Click: "Save Log" (generates: "hijackthis.log") HijackThis Tutorial
(recommended read)
- Next, go to: http://www.spywareinfo.com/forums/
- Sign in, go to the "Spyware and Hijackware Removal" section.
- Press "New Topic", copy and paste hijackthis.log into your new message.
Visiting the SpywareInfo Forum or one of the other recommended Forums,
to finish cleaning up your system is highly recommended. As neither
Ad-Aware or SpyBot can no longer completely remove these pests. This
is mainly due to new daily threats and the use of random generated
filenames used by these parasites!"
http://mvps.org/winhelp2002/unwanted.htm

I'm sure you'll be fine after using HijackThis - the folks at the
forum are very helpful.  Please let us know how it goes.

Good Luck,
hummer