Now you must be thinking that when one can simply visit the site http://www.mozilla.com/en-US/firefox/ why to install firefox from their ftp archive,well noone wants to do the hectic process but it helps when we are troubleshooting the virus issue & incase the virus blocks IE as we need to download many security tools from internet and the infections do not allow us to connect to internet via IE and keep popping up with annoying screens that we are infected and pay few dollars to get rid of infections which is totally a scam
If you also want to fix any infected computer Click Here To See Virus Removal Guide
Now this step is very helpful as we can download firefox and follow the virus removal guide
First of all go to run(simply start menu>>run in XP & windows key(the one next to Ctrl key with 4 blocks printed on it) + r key in windows vista and 7)
Now type here ftp.mozilla.org and click ok 
Now in the new window go to pub folder
Here go to firefox folder
Now click on releases
Here you will find all the till date releases of firefox lets go to a current stable release like 3.6.9 folder
Now here you can select your operating system incase you want firefox for any other purpose as if now for us its win32
Now select your language,lets go to en-US
Now here just double click the first file and your installation process will start,this is a very essential step in the virus removal guide incase unfortunately this one also doesnt work because of the severity of the infection just give a look at the steps in the guide,alternative step is also provided in form of Rescue Cd
