Had the same problem but to be honest the only thing i wanted from divx was the web player which avast has no problem with the converter or the other 1 but it has the problem with the player was able to uninstall the other 3 besides the web player. to do this i went into control panel>uninstall program> divx setup>uninstall checked the ones i didnt need hit uninstall avast popped up saying error with the opening potential blah blah blah> hit the pop down bar and hit cancel opening and was able to uninstall it properly.