I have avira antivirus and comodo firewall. Will the scan on defence plus clash with it ??

i have avira antivirus,comodo firewall comodo boclean with ad-aware(free)and avg anti spy as backup is this combination acceptable

I have avira antivirus and comodo firewall. Will the scan on defence plus clash with it ??antivirus

That looks like a solid combination and I can't imagine any conflicts; the only thing that *may* be bothersome is the Defence Plus itself. Seems to be real naggy.

I have avira antivirus and comodo firewall. Will the scan on defence plus clash with it ??computer

Raptor Defence Plus is a scam. It's what's known as rogue antispyware. You may prefer A-squared or Spybot
it will not crash / clash usually, if it does then don't use them at the same time.