[SOLVED] Cannot install Websocket protocol

KHJM92

New member
Apr 11, 2025
3
Hi,

I'm trying to install the WebSocket protocol on Windows Server 2019, but I'm encountering the following error:

PS C:\Users\beheer> install-windowsfeature -name Web-Websockets
install-windowsfeature : The request to add or remove features on the specified server failed.
Installation of one or more roles, role services, or features failed.
The referenced assembly could not be found. Error: 0x80073701


I came across this related post:
[SOLVED] - Windows Server 2019 Web Server (IIS) unable to install - 0x80073701

I followed the steps up to the point of creating the searchreg.txt, but I'm unable to create a fixlist.txt on my own.

I've attached the CBS log and the searchreg.txt for KB4538461, which was referenced in the CBS logs.

Could someone help me by providing a fixlist.txt or suggesting another possible solution?


Thanks in advance!
 

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Hi @KHJM92,

Welcome to Sysnative Forums!

If you haven't already, please review the posting instructions here, and attach the requested log files. Without log files, our helpers will not be able to assist, and this will slow down fixing your machine.

If logs have been already been provided, our team of volunteers will analyse the provided log files to build a fix for your system. Please be aware that this may take several days from your initial post, due to the high volume of threads that we receive.


- Sysnative Windows Update Team
 
Hi and welcome to Sysnative,

Please do the following first, just to be sure this update was partially removed.

Follow these instructions to remove an update.
  • Open the Start menu of Windows and type the command CMD
  • When you see Command Prompt on the list, right-click on it and select Run as administrator.
  • When command prompt opens, copy and paste the following command into it, then press enter.
Code:
wusa /uninstall /KB:4538461
  • Let me know if it says it was successful or you get the message: The update KB4538461 is not installed on this computer.
 
Hi,

Start the
577bf0efb8088-FRST.png
Farbar Recovery Scan Tool again.

Warning: This script was written specifically for this system. Do not run this script on another system.
  • Download the attachment fixlist.txt and save it to your desktop.
  • Right-click on FRST64.exe and select "Run as administrator".
  • Press the Fix button.
  • If for some reason the tool needs a restart, please make sure you let the system restart normally.
  • When finished, a log called Fixlog.txt will appear in the same directory the tool is run from.
  • Post the logfile Fixlog.txt as attachment in your next reply.

Afterwards try to install the WebSockets feature and post the result. If it fails attach a new copy of the CBS logs.
 

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