ewido.exe is a process associated with Ewido anti-spyware from Anti-Malware Development a.s..
You should not terminate this process if you want to use Ewido anti-spyware.
Non-system processes like ewido.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