Hi Mahmoud Adel,
1. Do yo install the WSUS role on the server at the first time, or it is a re-install?
2. When you install the role, it appears that "The server requires a restart", then, please restart the server and re-add the role again, check if it could help;
3. At the post-installation step, please check the log file in C:\Users\...\tmpA8E3.tmp, it may indicate the detailed progress and fatal error.
Best Regards,
Anne
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