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Microsoft 365 與 Office | Word | 家用版 | Windows
Microsoft 文書處理軟體產品系列，用於建立網頁、電子郵件和列印文件。
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Hi Minyu,
If you're using Windows 11, please note that Microsoft login error 0x800704cf may have been caused by the KB5079473 updated released on 2026-03-10.
Microsoft then fixed the issue by releasing an out-of-band update on March 21, 2026 (KB5085516). It raises the OS build number to 26200.8039 and 26100.8039.
Resolution
Please install the out-of-band update KB5086672 or KB5085516 to fix the issue. To check your OS build number, run winver.exe.