I have these various mouse problems for awhile now in my old computer(started 2 years ago). I naturally got used to it since I thought it would just fix itself. Left click won't work randomly sometimes and sometimes it would double click even if I only press the left mouse button only once. These problems still persists even if I change to a new mouse, reinstall drivers, reformat my hard drives, change to a different OS, etc. There's nothing seems wrong with my mouse(tested it with my friend's computer).