[HELP] My additional mouse buttons act weird

Maybe software conflict? My Logitech software used to conflict with the Razer software, but once I installed an older version of the Logitech software as they said me, it practically stopped, in my case the button "Enter" was randomly triggering by itself when typing, maybe is your case too, or just Windows 8 drivers problems.

Uninstalled mouse driver and plug it, didn't work, installed older and latest drivers, didn't work. I don't know about software conflict, I never used mouse software until now (brought by latest driver), but the software didn't detect my mouse. Weird.

Well, something like that happened to me with a keyboard, long ago. It's probably some drivers issue... When you install the drivers, do you get a software to change some settings or something?