I see just the opposite, however - the Network Shield in combination with Comodo will visibly slow down even a rather advanced hardware configuration. Most of the related discussions point to the fact that the Network Shield is one of the most economic Avast components performance-wise and should not produce any significant effect if combined with Comodo Firewall. Unfortunately, I could get no clear answer to that. I've done some more reasearch on whether the Avast Network Shield is needed in the presence of a firewall. Tested on two PCs - one an older Athlon with 1,5GB RAM (WinXP), the other - a Core i3-2350M with 8GB RAM (Win7 圆4). The applications that were previously struggling to start for several seconds are now loaded in no time. And I've noticed an immediate and substantial increase in performance. Yesterday for some reason I turned off the Network Shield in Avast. The Sandbox is disabled in Avast and enabled in Comodo (I've tried it vice versa to no visible effect on performance). In Comodo avastsvc.exe, avastui.exe and tup are added to Trusted applications under Network Security Policy/Application rules. In Comodo the Avast is added to Exlusions in Shell-code detection. In Avast all Comodo executables are added to Safe Processes in the Behaviour Shield. In Avast the Comodo folder is added to Exclusions in the File System Shield. ![]() In Comodo the Defence+ is set in Safe mode. ![]() In Comodo the Firewall is set in Custom mode. The basic settings scenario as far as the possible interaction between Avast and Comodo is concerned is as follows: I've researched the different forums for information on correct settings of both required to provide maximum possible protection and lowest interference and decrease in the overall system performance at the same time. ![]() I've been using Avast Free AV combined with Comodo Firewall for a couple of years by now.
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