nmindexstoresvr.exe is part of Nero Scout that comes with Nero CD/DVD Burning 7.
Nero Scout is a database program that catalogs all of the media files on your computer and that makes this database available to other programs in the Nero 7 product package.
This process can be removed to free up system resources.
Non-system processes like nmindexstoresvr.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