I'm using windows installer for a client's app, and they are complaining that sometimes multiple instances of an app appear on the computers they are using for testing. This problem has gone away since I hid the option install for "just me" and "everybody", and just set it to install for everybody. New versions are downloaded and installed about once a week and over a period the multiple versions have appeared, even though each installer supposedly removes older versions.
Is there something wrong with this? Am I likely to run into problems down the line?
Why would someone want to install for "Just me" anyway?