acrotray.exe is a process belonging to the Adobe Acrobat Traybar Assistant which provides a shortcut to additional configuration options for Adobe products.
This program is a non-essential system process, and is installed for ease of use.
Non-system processes like acrotray.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues