What version of .net Framework comes standard with:
Windows XP?
Windows Vista?
Windows 7?
What maximum version of ASP.NET will run on each Windows version?
I’d bet that would be something microsoft would document. Have you looked there yet?
Windows XP SP1 : .NET Framework 1.0 + SP2 as an OS component.
Windows Vista : .NET Framework 2.0 and 3.0 as the Optional Component which can be installed latter if you want.
Windows Vista (SP 1) : .NET Framework 2.0 SP1 and 3.0 SP1 as the Optional Component which can be installed latter if you want.
Windows 7 : .NET Framework 3.5
And as wwbb_99 said you would also find complete documentation of its version on the Microsofts Site