Free anti virus will not install.?

Hi there, this used pc that i bought had an old norton firewall and antvirus that i removed , i installed CC cleaner, Online armor, tune up utillities 2008, and i also tried installing the following three , Avira, AVG, Avast antivirus (not all at the same time) all of them started out okay but paused after 4gb , i should add that theres 40 gb of hard drive and i cleaned out the cache, ETC what could be going wrong any advice here?

Free anti virus will not install.?norton ghost

The previous Norton installation may not be completely uninstalled.

Run the Norton Removal Tool and try again.

Norton Removal Tool: http://service1.symantec.com/SUPPORT/tsg...

Free anti virus will not install.?software

if you don't want to install an antivirus, then probably you can try a free online scanner, like:

http://housecall65.trendmicro.com/

http://www.pandasoftware.com/activescan/...

http://usa.kaspersky.com/products_servic...

or Google for "free online anti-virus"
You definitely DO NOT want to run more than one anti-virus program. Uninstall one and use the other only. You can run multiple anti-spyware programs though and it is recommended.

Your computer may lock up or run super slow by having more than one AV program!
Try revo uninstaller and remove all the left over of Norton that may interfere with your new software also, be sure that you are the administrator so you can have full access.