emsw.exe is a spyware from Alset Inc and is also known as "HelpExpress". This process should be removed to ensure your personal privacy.
Non-system processes like emsw.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.