I'm having the exact same issue. I have admin privilege and the msi is located in my downloads folder (just tried putting in directly into C:\ and I got error 1303 admin privilege)
Error 1720. There is a problem with this Windows Installer package. A script required for this install to complete could not be run. Contact your support personnel or package vendor. Custom action ConfigureWindowsAuthenticationSettings script error -2146827864, Microsoft VBScript runtime error: Object required: 'WScript' Line 18, Column 3,
Thanks,
Josh
