This Error Code 800F081F is commonly caused due to the .NET framework installation failure. These are following ways in which you can attempt to correct this error. This .NET Framework 3.5 for Windows 8 or Windows 8.1 won’t come pre-installed. Windows 8, Windows 8.1 or Windows 10, and must be separately enabled to run applications that depend on it. To enable the .NET Framework 3.5 in Control Panel to avoid Windows Update Error code 800F081F.