I've run InstMSIW.exe, but ActivePerl doesn't seem to be installed.
What's wrong?
InstMsiW.exe and InstMsiA.exe are patches for older versions of Windows to allow them to use our MSI installers. People often mistake this download for the ActivePerl installer itself, which can be found on the left-hand side of the download page:
http://activestate.com/Products/Download/Download.plex?id=ActivePerl
Select the link under 'Windows' for the MSI installer.