neo.exe is the executable for Price Patrol, an application from Half.com. It is an Internet shopping companion for finding the best on-line prices. This is a non-essential process.
Disabling or enabling it is down to user preference.
Non-system processes like neo.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.