If you are receiving specific error codes (like 0x800F0906 or 0x800F081F ) stating that the source files cannot be found, you may need the official offline installer. This is intended for system administrators or offline machines.
: It is highly recommended to restart your computer to finalize the configuration. Official Download Options microsoft net framework 3.5 1 windows 7 64 bit download
For , you generally do not need to download .NET Framework 3.5 manually because it is already built into the operating system. You simply need to enable it through the Windows features menu. How to Enable .NET Framework 3.5 on Windows 7 If you are receiving specific error codes (like