If your product is among:
NAV 3.0 & 4.0 for DOS/Win3x
NAV 2.0 for Win95
NAV 2.0 for WinNT
Norton Utilities 2.0 for WinNT
Norton NT Tools
NAV 4.0 & 5.0 for Win9x
NAV 4.0 & 5.0 for WinNT
pcAnywhere32 7.5 and higher for WinNT
NAV for NetWare 
You can use:  
0809x86.exe August 09 August 12 4.26 MB