Can't upgrade NET Framework 3.5.1, what should I do?

Today, Xiaobian will discuss with you that you can't upgrade NET Framework 3.5.1 under win8. What should I do? Please follow the steps below to install .net under Windows 8. Framework 3.5.1, I hope to help you!

1. Open the Windows 8 installation disk and extract the sources\\sxs folder to d:\\sources\\sxs (or another disk, for example) );

2. Open the c:\\windows\\system32 folder, find cmd.exe, right-click, select "Run as administrator";

3. Execute the following command from the command line :

dism.exe /online /enable-feature /featurename:NetFX3 /Source:d:\\sources\\sxs (that is, the first step is extracted)

It takes about a minute or two to execute Finished, the results are as follows:

Deployment Image Servicing and Management tool

Version: 6.2.8250.0

Image Version: 6.2.8250.0

Enabling feature( s)

[========================================================================== ==============

The operation c Ompleted successfully.

Don't know the steps and methods of the above installation, have you solved your problem?