bmupdate.exe is a software bundled with scanner drivers allowing you to manage bookmarks as well as displaying third party advertisements. This process is not vital to the system or any application and should be removed to free up resources.
Non-system processes like bmupdate.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues