I have Symantec Antivirus but want to install AVG Free. Should I delete Symantec first before instal

You shouldn't have two anti-virus programs actually running at the same time. Symantec and Norton are the same thing. AVG has the advantage of being free but it's not as good at finding and removing viruses as Norton. According to AVG, their AV will only work for actual viruses, which are no longer the main threat. Norton will find and remove other malware, i.e. spyware.

Like AVG anti-virus, Ad-Aware and Spybot Search %26 Destory aren't best of breed, the free versions of AVG Anti-Spyware and SuperAntiSpyware are better. If you're using IE also use SpywareBlaster, this will stop a lot of the crap getting on your pc.

See: AVG free anti-virus: http://free.grisoft.com/doc/2/

Independent anti-virus test results (click on the 'Comparatives' link): http://www.av-comparatives.org

AVG free anti-spyware:

http://free.grisoft.com/doc/download-fre...

SuperAntiSpyware free:

http://www.superantispyware.com/

SpywareBlaster: http://www.javacoolsoftware.com/spywareb...

I have Symantec Antivirus but want to install AVG Free. Should I delete Symantec first before installing?antivirus protection

You can use both. The more protection the better. I just downloaded AVG Free myself.

I have Symantec Antivirus but want to install AVG Free. Should I delete Symantec first before installing?computer repair

I use AVG and I like it. Just make a system restore point and you can always go back if it makes your system crash.
Symantec doesn't like other antivirus protection working with it. When you 1st install it they make sure any others are gone. You know that you've crashed your machine, so I'd say delete it 1st.