geomdiffswu.dll is a GeomDiff
belonging to Solidworks GeomDiff
from Geometric Software Solutions Ltd.
Non-system processes like geomdiffswu.dll 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.