Windows 10 無法透過開啟或關閉Windows功能安裝 .NET Framework 3.5

若Windows 10 無法透過開啟或關閉Windows功能安裝 .NET Framework 3.5/3，會出現 0x800F081F 錯誤碼，如圖一，則可利用原本安裝片或安裝光碟來安裝 .NET Framework 3.5/3

1. 搜尋指令 cmd -> 按滑鼠右鍵選擇以系統管理者執行
2. 放入光碟或隨身碟，假如掛載在 F:
3. 輸入指令 f:
4. 輸入指令 cd sources
5. cd sxs | dir       /* 可以看到　Microsoft-Windows-NetFx3-OnDemand-Package.cab 為我們的目標  */
6.  輸入 dism /online /add-package /packagepath:microsoft-windows-netfx3-ondemand-package.cab
如圖二




















(圖一)














(圖二)

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