@ abcdefg3477,

Using Comodo here with AIS ver6.0.1091 here on a Windows 7 x32 pc. No conflicts whatsoever.

Comodo IS ver 5.3.181415.1237

  • no AV
  • D+ (Safe Mode) with sandbox enabled
  • Place Avast folders in Firewall>Trusted Application / D+>Trusted Files
  • Excluded Avast folders in D+ settings> Execution Control Settings

Avast IS:

  • no firewall
  • no WebRep
  • no Behavioral shield
  • Auto Sandbox disabled
  • Site Blocking / AntiSpam enabled
  • Sandbox installed(seldom used --using Sandboxie paid)
  • Excluded Comodo folders in File System Shield and Settings

Might you share your settings for Comodo/Avast so the guys can see where the conflict may arise? And the D+ logs will be a good help also as mentioned by Tenko.

Some links here:

http://forum.avast.com/index.php?topic=63405.0

http://forum.avast.com/index.php?topic=61454.0

http://www.wilderssecurity.com/showthread.php?t=294741

http://forums.comodo.com/empty-t69880.0.html

http://forums.comodo.com/empty-t64783.0.html

http://forums.anandtech.com/showthread.php?p=31321866

http://forums.comodo.com/empty-t69086.0.html

http://forums.comodo.com/empty-t70046.0.html

http://www.seasonsecurity.com/comodo-vs-avast-help-plz-75638