system
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I had a problem a few weeks ago using my XP Service Pack 3 computer with Avast and Comodo last version + Defense Plus, I was not able to browse and programs started very slowly, the computer was at 100% and I had to uninstall Comodo in that machine and I installed PrivateFirewall instead.
I help people in another forum and I found that that 3 more people were having the same problem in their computers too and the problem is gone when they uninstall Avast and put another antivirus software or they remove Comodo firewall…
I remember I asked here if there were incompatibility problems between these 2 softwares but nobody answered.
rm