Menus scroll and 3rd-person camera zooms out without any input

I suspect this is related to having a game controller connected and enabled. I would access the options and uncheck "Use Gamepad" and try again.

This happened once in a while to me, on a really crappy mouse. But it only when trying to use the Bow Skill Eagle Eye. When trying to zoom with the left button it mess up and become ridiculously hard to focus.

It is possible that closing Skrim, unpluging your mouse and any controlers((or desinc what ever you need to do)), then plugging in one OR the other, NOT both ((try just mouse first)) and making sure your game settings are set to only the one you're planning on using could solve this issue.

If it still persists you may want to check to make sure if you're using mods that effect the camera or add animations ((as some animation do cause the camera to zoom in or out to perform)) are off, then try again.

↑ Pretty sure this is what I had to do to fix mine.

There are three possible reasons for this:

1. Driver issues:

   You may be having issues with the drivers for your controller, mouse or keyboard. I suggest a quick Google search for the model of your peripherals and drivers (i.e. "logitek x*** drivers windows). This is usually the first culprit.

2. Corrupted game files:

   In this case, your best bet is doing a clean reinstall of the game. Back up your save file and try again.

3. Faulty hardware:

   This one is harder to figure out. Could be your controllers, could be something in your pc. Either way, if this is the case, good luck, because it'll be very hard to find out what it is. I suggest trying different peripherals and praying you only have to replace one of those.

If you have Fores New Idles installed uninstall it and then reinstall, The next thing would be to look online for how to disable game pad and your touch pad's gestures if you are using a laptop.

I am on a lap top, I am going to make sure my hardware if up to date also you may want to go into steam and verify the integrity of the game's cache.

I like using my mouse so I don't want to disable it until I am finished with the game because it's a pain in the ass to do. So what I recommend is the mod better message box controls and for you to disable your mods and then renable them to see which one is corrupted for me I am pretty sure it's Fores New Idle System. That mod add player animations and the glitch only happens after and animation has been played on the character.