Never used comodo. I only had MS problems when MS was new. Mostly because there were ways to use ZAP to bypass MS back in the day, when blocking single connections did the trick. After they got gameguard'd up and sex'd up, they started trying to block ZAP, which didn't work and sometimes left me in BSODs if I was windowing as well. Overall it was problematic, but soon after the end of beta, and eventually Nexon America coming in, there was no problem.