Installing Comodo PF and AV at once isn't recommended?

I read somewhere here at the forum about a post already, unfortunetly, i couldn’t find it. The topic was somehow about installing the av and fw on the pc and he had problems.

Now as i see, the system is somehow slow down itself if i install both at once (didn’t try after 1-1 restarts). Is this a bug or specific?

I might be able after a while to open up taskmgr but it seemd impossible to opan add/remove (and installer service is needed for av).

My solution was to delete the comodo registry entries.