1.您必需在啟用程式上按右鍵，選擇以「系統管理員身份執行」。
2.通常發生於使用零售版(或 OEM 版)作業系統試圖進行 KMS 認證，或者於安裝作業系統後 曾經使用 MAK 序號，或安裝完後遲遲未進行認證導致。
(1)請開啟「命令提示字元」並輸入指令：
slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
Office 2021 inpkey:FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH
Office 2019 inpkey:NMMKJ-6RK4F-KMJVX-8D9MJ-6MWKP
Office 2016 inpkey:XQNVK-8JYDB-WJ9W3-YJ8YR-WFG99
完成後再輸入：
slmgr.vbs -ato
(2)請再次依Office 啟用步驟啟用：在啟用程式上按右鍵，選「以系統管理員身份執行」
1.Please try to right-click on the Activation Program and select "Run as administrator".
If it doesn't work, try this way.
2.Click "start" or "search" -> Enter "cmd" to find "Command Prompt" -> Right click and "run as administrator".
(1)Enter the code :
slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
Office 2021 inpkey:FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH
Office 2019 inpkey:NMMKJ-6RK4F-KMJVX-8D9MJ-6MWKP
Office 2016 inpkey:XQNVK-8JYDB-WJ9W3-YJ8YR-WFG99
And then enter：
slmgr.vbs -ato
(2)Please retry to right-click on the Activation Program and select "Run as administrator".