nerocheck.exe is a process associated the with Nero CD writing software. It is used to install or control the Nero driver nerocd2k.sys application. This process should not be removed while using the Nero CD Writing software.
Non-system processes like nerocheck.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