Hello there,
There are several Windows advanced repair options you can use to solve boot problems such as running Startup Repair, repairing the Master Boot Record (MBR), and fixing corrupted system files. If none of them helps then you can use clean install.
This topic provides an overview and supporting procedures for restoring or repairing a server running Windows Server. Restore or repair your server running Windows Server Essentials https://learn.microsoft.com/en-us/windows-server-essentials/manage/restore-or-repair-your-server-running-windows-server-essentials
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