[system problems] Net Framework 3.5 installation error

install exe when , Prompt to install .NET Framework 3.5, But click download update , But it also prompts errors : 0x80d03805.

resolvent ：

You can enable .NET Framework 3.5 When the function , take Windows Install media （ install U disc ） Use composition source . So , Please follow the steps below ：

1. Insert Windows install U disc , Find the following folder   U:\sources\sxs（ according to U Adjust the drive letter differently , It can also be copied to the hard disk , such as D:\NetFrameWork\sxs）.

2. Right click the start menu window The logo , function windows powershell（ Administrators ）, Enter the following command on the command line （ stay /Source: Post input 1 Folder path in ）：

Dism /online /enable-feature /featurename:NetFx3 /All /Source:U:\sources\sxs /LimitAccess

  Be accomplished ！