By default Windows 8 has built-in Microsoft .NET Framework 4.5 version. Sometimes you may want to run apps or programs, which require the older versions of .NET Framework like 3.5, on computer or Surface tablet, here is the tutorial about how to install old .NET Framework 3.5/3.0/2.0 on Windows 8 Pro OS without download .NET from the Microsoft website.
* From start screen, open charms bar, type “Turn Windows” into the search box and select “Turn Windows Features On or Off” from result.
* In the new dialog box, check .NET Framework 3.5 (includes .NET 2.0 and 3.0) box. Then it will ask if you want to install it, click on “Install this feature.
* Windows 8 don’t include .NET Framework 1.1, so you need to download it.