[dannzeman]

It may be because a piece of software you installed is messing with something. If you have pocket rar then that could very well be the problem. It may just not be associating zip files with it correctly. Maybe check the settings and see if there is something for file association. Other than that all i could say would be to hard reset, reinstall apps one at a time and see when it goes bad. I know, not a great alternative but really the only one I can think of.