Installed the latest version on 2 XP Pro systems and Comodo was using between 30% and
35% of CPU time, sometimes higher.
I had a couple of Anti Spyware pgms installed, removed them and all is well now even with all Comodo logging running.
I suspect that the problem was tied to SpySweeper interacting with Comodo.
Tried Outpost, same problem, same fix.
Something to check.