utilman.exe is the Windows Utility manager giving you access to useful UI settings within Windows. This process is not an essential part of Windows and can be stopped at any time.
Non-system processes like utilman.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