Hi Alex,
The Visual C++ 2008 SP1 Redistributable prerequisite uses the same detection criteria for both platforms (x86 and x64). Therefore, the predefined prerequisite in Advanced Installer can also be used for the 64-bit version.
Please note that in the
Install Conditions tab of the "New Prerequisite" dialog you can set the Windows versions supported by the prerequisite. For Visual C++ 2008 SP1 Redistributable x64 you can uncheck the "Window NT from" option.
Regards,
Cosmin