why can't I completely remove Firefox?

Your problem does not rest in firefox, you have a rootkit.

Use TDSSKiller, and GMER to get rid of it. No need to install them ,just download to the desktop, and double click the icon(s) to open the scanners.

Click the tdsskiller.exe link to download:

http://support.kaspersky.com/faq/?qid=208280684

Read the FAQ's at the bottom of the page to make sure you use this program correctly:

http://www.gmer.net/

I would also install, and run a FULL scan with MBAM, it's free:

http://www.techspot.com/downloads/4716-malwarebyte...

Click Start then click Run

enter c:\documents and settings

There will be a list of users for the computer. Open up each user directory and double click on application data.

Remove and Mozilla and Firefox folders

Should be done

This won't fix the problem and unnecessarily deletes information that will be handy in the future. Run Malwarebytes and get a root kit eliminator. You can often get rid of the redirect by turning off proxies in Firefox settings. You still have the malware installed however.

First, let me know if you're going through Control Panel and Add Remove Programs to get rid of Firefox.

You need to delete the application data that are store on your computer

http://kb.mozillazine.org/Profile_folder

- or -

http://support.mozilla.org/en-US/kb/profiles-where...