Clients cannot contact WSUS (Error 802400E)

We have been facing the following problem for more than two months.

Our clients cannot contact our WSUS server.

KB3148812 installed automatically and I uninstalled it and did not perform the post instructions. Then installed KB3159706 and I added the feature “HTTP Activation” and rebooted the server but still no success.

Kindly assist me in this matter because this problem made our work miserable.

Thanks & regards
Yousuf ShahzadAsked:
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Sajid Shaik MSystem AdminCommented:
check this article  posted on
Hey all, just installed KB3159706 on my WS 2012 R2 WSUS Server at 2PM on 5/5/2016.  This was supposed to fix/issues when KB3148812 was released a few weeks ago.  Don't install KB3159706, it breaks WSUS.
C'mon Microsoft, get your stuff together.  I'm tired of this amateur hour BS.

Shane - Did you do the manual post installation steps after installing KB3159706?
Manual steps required to complete the installation of this update
Open an elevated Command Prompt window, and then run "C:\Program Files\Update Services\Tools\wsusutil.exe postinstall /servicing" (case sensitive, assume C: as the system volume).
Select HTTP Activation under .NET Framework 4.5 Features in the Server Manager Add Roles and Features wizard.
Restart the WSUS service.
Yousuf ShahzadAuthor Commented:
Mr. Sheikh

When I try to run "C:\Program Files\Update Services\Tools\wsusutil.exe postinstall /servicing" on Command Prompt, I get the following message:

"C:\Program is not recognized as an internal or external command, operable program or batch file"

Kindly assist me what to do next?

Thanks & regards
Sajid Shaik MSystem AdminCommented:
did you check the path i.e

the following is existing  C:\Program Files\Update Services\Tools\wsusutil.exe

did u run the command prompt as administrator ?

ps check
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Yousuf ShahzadAuthor Commented:
Yes, the path exists.`

I ran CMD in both ways; as administrator and without administrator.

Sajid Shaik MSystem AdminCommented:
Select HTTP Activation under .NET Framework 4.5 Features in the Server Manager Add Roles and Features wizard.

(case sensitive, assume C: as the system volume).

C:\Program Files\Update Services\Tools\wsusutil.exe postinstall /servicing

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Yousuf ShahzadAuthor Commented:
Oh sorry my mistake.

The command ran successfully.

Post installations succeeded.

Just rebooted and I will check whether WSUS is working or not then I will let you know.

Sajid Shaik MSystem AdminCommented:
Yousuf ShahzadAuthor Commented:
Thank Allah

WSUS is working.

I really thank you from the bottom of my heart. So nice of you.

Then in "Update Window" I clicked "Check for Updates" button and it started checking updates.

My question is that now WSUS server will automatically update all our PCs or I have to go one by one and click "Check for updates" button?

Sajid Shaik MSystem AdminCommented:
it should update automatically depends up on deployment if its deployed through go
Sajid Shaik MSystem AdminCommented:
Please close the question as well thanx
Yousuf ShahzadAuthor Commented:
Yes, Please

Thanks a lot for your kind assistance and precious time for me.

Sajid Shaik MSystem AdminCommented:
accept the solution with points please
Yousuf ShahzadAuthor Commented:
What is the point system. Let me know plz then I will give the point.
Yousuf ShahzadAuthor Commented:
I do not understand how to point this
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