Disabled sections (not hidden)

Hi! New here to this splendid installer. I have a program that requires a DotNetFramework test to be done before anything happens. I know how to create the section so it is hidden and automaticaly is executed, but how do I create it so the user can see it but not uncheck it?

See included ${NSISDIR}\Examples\example2.nsi :-)

Well lol I totally missed that one. Thanks anyway!