Error 800B0001 for WSUS windows server 2008R2 X86

Please, I have window server 2008R2 X86 and I installed WSUS on it and I did the GPO to update all computers. I got no errors when I did the installation. However, when I tried to update the clients using wuauclt / detectnow I got an error 800B0001.

Any help will be appreciated.

Math TecAsked:
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Is this update installed?
Here is some troubleshooting help
Have you looked at the log windowsupdate.log at the root of 'Windows', on a client PC? What errors does it show?

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Math TecAuthor Commented:
Thank you.

Should I apply the update directly or I have to uninstall WSUS and install the update then install WSUS on the server again?

Just install the update. Is the WSUS server set to get updates from  other microsoft products?
Math TecAuthor Commented:

No, its deploy windows update to the clients only.

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