I think its unacceptable to require 'uninstallation' of a competing product when simply disabling it should be sufficient.
So, consider this a lost customer post, because I refuse to support software which does not play nice with other software.
Sorry,
teknojnky, but you are wrong. This has really nothing to do with "competing products". As Rejzor said, antivirus software are low level programs - and the programs conflict with each other beause of the principle they are based on. So, having 2 AV programs installed together is calling for troubles. Even though you may think disabling is enough,
it is not. It may work for a while, for a particular configuration and settings, but it is likely to cause troubles sooner or later - freeze your computer, cause bluescreens (with the obvious consequences, such as corrupting the data on your disk, loosing the unsaved work, etc.)
We simply don't want to take that risk. It's better to show a warning message and disable certain parts of avast! than explain the user why he cannot boot the computer anymore (i.e. "why avast! completely crashes his OS" - because that's what they'd think).
Sometimes, "false positives" might occur, such as when some Symantec products is announced as NAV even though it's not. We would like to avoid that, of course, but the presence of NAV (or other AV software) is not so easy to detect - we look for specific drivers, but sometimes the company uses a driver with the same name in different products... or, they don't remove the drivers even though they don't use them anymore, etc.
