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Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Hi,
WSUS = Windows Server Update Services, corresponding to tag windows-server-update-services. It seems this is not a WSUS related problem, however, here's an article containing several solutions and we may try some of them to see if it helps.
https://thegeekpage.com/fix-the-installation-failed-in-first-boot-phase-error/
Note: this is not from MS, just for your reference.
Alex
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