[Setup]: MinVersion

Format:

a.bb,c.dd, where a.bb is the Windows version, and c.dd is the Windows NT version.

Default value:

4.0,4.0
Description:

This directive lets you specify a minimum version of Windows or Windows NT that your software runs on. To prevent your program from running on Windows or Windows NT, specify "0" for one the minimum versions. Build numbers and/or service pack levels may be included in the version numbers.

If the user's system does not meet the minimum version requirement, Setup will give an error message and exit.