backitup.exe is a process belonging to Ahead's Back It Up facility, which allows selective backups on of files on your system. "This program is a non-essential process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like backitup.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