If an application is prompting you for this version, it is likely disabled in your Windows features. Follow these steps to activate it:
Windows 7 environments—especially those missing historical update rollups—can occasionally trigger deployment errors. Here is how to fix the most common failures: Error Code 0x800F0906, 0x800F0907, or 0x800F081F microsoft net framework 3.5 1 windows 7 64 bit download
If you attempt to run a standalone installer (like dotnetfx35.exe ) on Windows 7, you will likely receive an error stating you must use "Turn Windows features on or off". If the feature fails to enable: If an application is prompting you for this
Windows 7 requires certain baseline updates to install frameworks seamlessly. Ensure your machine has installed. You can verify this by right-clicking "Computer" on your desktop or start menu and selecting "Properties." Keeping Your Framework Secure If the feature fails to enable: Windows 7
Wait for the list to populate. Look for .