I agree. If you're running two or more pieces of web filtering software on your system, conflicts are pretty much inevitable.
I do apply Microsoft's patches, but I don't apply updates from anyone
"Computer software like fine wine ... let it age."
Anytime a new update to anything comes out, someone
will be a "bleeding-edge adopter." You, meanwhile, can sit-back a few days or weeks, observe the bleeding as it happens, and avoid the cuts yourself.
For this reason, I don't use "automatic updates." The people that a vendor "pushes" updates to are,
by definition, "the bleeding edge."
can do it. I remember an update-tape from IBM's mainframe division that left the system unbootable. I'd never applied it.