Well that may or may not be the case as freezes are often the result of conflict, not just the result of another AV. Removing one element of any conflict should break any conflict, but what it doesn't do is confirm exactly what the true cause is.
I get random freezes when I open certain explorer folders (or select files within these folders) using RocketDock, I have shortcuts to my _avast4_ and screencapture folders and it is within these that the problem occurs.
When this happens the mouse pointer still moves, but clocking or right click functions don't work. The keyboard function still works, so I give it the three finger salute (Ctrl+Alt+Delete) to bring up task manager and there is zero high CPU usage, something has locked, I tried ending some processes, but by ending explorer.exe and then starting it again breaks the lock.
Now I really don't know what it is and believe me I have searched the net till I'm blue in the face and I haven't found the true cause. This never used to happen on my old system same deal XP Pro SP3 avast and other applications, etc. a right royal pain in the rear and no closer to solving it, but the above action resolves it and isn't that onerous.