How to Repair the Microsoft .NET Framework
OpentheControlPanel.·OpenProgramsandFeatures.·SelectTurnWindowsfeaturesonoroff.·SelectthecheckboxnexttoMicrosoft.NETFramework3.5.xor4.,Youcanrepairyour.NETFrameworkinstallationusingthe.NETFrameworkRepairTool.Ifyourappstillisn'tstartingafterrepair...。參考影片的文章的如下:

![How to Repair NET Framework on Windows 1011 [Tutorial]](https://i.ytimg.com/vi/qHvT8Q8Ogkc/hqdefault.jpg)