Convert NR3 to WMV

nr3 to wmv conversion seems to be related to attempts to export or conversion of Nero compilation or perhaps a recovery of multimedia files. Such export is most likely not possible as these compilations usually do not contain multimedia files, just references to them which means direct conversion is unlikely. At best you can check out for the location of these files, but you will most likely require Nero software for this. If you have any issues with .nr3 files, perhaps it would be best to contact Nero support.