For those of you users of Windows 11 21H2 or Build 22000, Microsoft has recently released update KB5020387 which is shipped as an OOB (out of band) update and will change the OS build to 22001100.

Well this update was released and is intended to fix Transport Layer Security (TLS)/ Secure Sockets Layer (SSL) issues in Windows 11 as users reported in the Feedback Hub.

This problem itself occurs when the user tries to establish a connection between client and servers, connection will fail. However, with the update released this time, the problem has been resolved.

“We address an issue that might affect some types of Secure Sockets Layer (SSL) and Transport Layer Security (TLS) connections. These connections might have handshake failures. For developers, the affected connections are likely to receive one or more records followed by a partial record with a size of less than 5 bytes within a single input buffer. If the connection fails, your app will receive the error, “SEC_E_ILLEGAL_MESSAGE”.” Obviously Microsoft.

Now because this update is an OOB update, this update is not available on Windows Update, in other words, you have to download and install it manually from the Microsoft page. following.


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