What is this tray icon?

Question

Windows

Green arrow, like an update, but what?

Answer 1

The unknown crap was called dwm.exe - desktop window manager

Answer 2

Start the task manager and disable unknown processes one by one on behalf of the user, although this method is unlikely to work for you. Look at what you have in autoload, it's more convenient to do it through special. programs, for example through CCleaner.