dwtrig20.exe is a process associated with Watson Subscriber for SENS Network Notifications from Microsoft Corporation.
This is a legitimate file (not spy/malware) which sends error reporting information to Microsoft if a programme crashes. It will ask your perfmission before sending. It is recommend leaving the file in place.
Non-system processes like dwtrig20.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