Can I download free antivirus when I still got Norton that is not activated ?

I have Norton Antivirus on my computer, but it needs activating whitch I can't do cause I haven't got the product number. I tried to download the free antivirus from the internet, but nothing happened. I don't know whether I need to cancel the old antivirus before getting the new one form the internet. I really don't know what to do, Norton still comes up and says I have a problem that needs fixing. Could anybody give me an answer here, please?

Can I download free antivirus when I still got Norton that is not activated ?spyware

Use this to unsinstalll Norton Uninstalling your Norton or Symantec product

http://service1.symantec.com/SUPPORT/sha...

If you are looking for free programs for Windows i recommend:

BitDefender Antivirus: http://www.bitdefender.com/no/view/Downl...

Comodo Firewall: http://www.personalfirewall.comodo.com/

Anti adware/spyware/malware:

Comodo Anti-malware: http://www.comodo.com/boclean/boclean.ht...

Ad-Aware: http://www.lavasoft.com/products/ad_awar...

Spybot S%26D: http://www.safer-networking.org/en/index...

SuperAntiSpyware: http://superantispyware.com/

AVG Anti-Rootkit http://www.grisoft.com/doc/download-free...

CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. http://www.ccleaner.com/