I have had to uninstall the latest CIS firewall from XP. The program I have to use in XP was jittery and sluggish, so I went searching for the cause. Turned out to be the Comodo’s “cmdagent” constantly downloading something. The XP is running as Guest in VMWare Player and it had downloaded 73GB (yes, “GIG”) in just under an hour of “up” time!!!
I have several other Guests (win7, Vista, win8.1) that I run in the Player and none of them continuously download stuff. I think CIS is broken for XP.