Server 2008r2 unable to install software or updates or activate the ESU due to corrupt files and digital signature issues

I'd verify system and servicing health by running;
sfc /scannow

also system update readiness tool

https://video2.skills-academy.com/en-us/troubleshoot/windows-server/deployment/fix-windows-update-errors

Then check for errors in;
%SYSTEMROOT%\Logs\CBS\CheckSUR.log

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Hi DSPatrick

Thank you for your reply, we have tried the scannow command which returned the below:

I have asked them if they/we can run the others.
Regards
Melissa

Something here may help.
https://video2.skills-academy.com/en-us/troubleshoot/windows-client/deployment/analyze-sfc-program-log-file-entries

also check the results of SUR tool here.
%SYSTEMROOT%\Logs\CBS\CheckSUR.log

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Hi Melissa,

Would you create a capture for error message when try to activate ESU?

Please refer to the link below to check if you have installed the SHA-2 code signing support update and servicing stack update (SSU) under Installation prerequisites.

Obtaining Extended Security Updates for eligible Windows devices

After that, activate with command line slmgr /ipk <ESU key> and recheck with slmgr /dlv.

If issue persists, after upper actions, please provide error message in Command Prompt.

Bests,

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