On my windows 8 lapt op Just clicking to zoom zooms out and holding the alt key at the same time zooms in. It's the opposite of what should happen. Only me? How to fix? It wasn't like this at first.
It works just fine on my mac so it's getting a bit confusing switching from mac to windows.
Try resetting your prefs. You may have a software conflict with something recently updated installed. Check your process viewer, and quit suspect processes to find the culprit. Use system restore to go back to a previous state of your OS.
It's only you. Normally just clicking the mouse button (no modifier keys) zooms in.