udserve.exe is a process belonging to Executive Software Undelete.
Undelete helps the user rescue and restore lost files within the Windows file system. This process should not be removed while running Undelete.
Non-system processes like udserve.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues