How to Solve Error Code 0x80070020 Windows 10 Update
This Error Code 0x80070020 is commonly caused due to the .NET framework installation failure. These are the following ways in which you can attempt to correct this error.

Disclaimers: Before you attempt to fix an issue with the windows update, we highly recommend you to take a registry backup and create a system restore point as a precaution method. In case if something goes wrong, we can restore your computer to the same stage and fix the issues. (In case if you not sure how to back it up, talk to an expert for assistance.)

Solution to Error Code 0x80070020 :
This .NET Framework 3.5 for Windows 10, 8 & Windows 8.1 won’t come with pre-installed. Windows 8, Windows 8.1 or Windows 10, and must be separately enabled to run applicati