How to solve the problem Download Microsoft .NET Framework 3.5 in windows 8 or windows 8.1

How to solve the problem Download Microsoft .NET Framework 3.5 in windows 8 or windows 8.1 if you cannot install it just follow the step:

Step 1 : Run cmd as Administrator "Run as Administrator"

Step 2 : Mount or Insert "Windows 8 Developer Preview DVD or keep the mount or insert DVD that you just install"

Step 3 : Consider "G:\" is your DVD Drive. Enter the command below in elevated "cmd" and Change the drive letter at the position "/Source:G:\"

Cmd :
dism.exe /online /enable-feature /featurename:NetFX3 /Source:D:\sources\sxs /LimitAccess

Powershell command :
Enable-WindowsOptionalFeature -Online -FeatureName 'NetFx3' -Source 'G:\sources\sxs'

G:\ Specifies the Windows 8 DVD...