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Microsoft investigates a bug in Windows 11 that affects VPN connections

Microsoft is investigating some issues that are affecting the speed of L2TP/IPsec VPN connections that some users and administrators have reported after installing the latest Windows 11 update: KB5026372 .

The Redmond giant has implemented the same fixes and improvements included in the previous KB5025305 update within the cumulative KB5026372, which was released during Patch Tuesday released this month. Apparently the connection failures with the L2TP/IPsec VPN were already present in KB5025305 and consequently they have reached KB5026372, so now there are a greater number of users affected by the problems.

A Windows administrator has reported via Reddit that he finds no problems connecting to the VPN, but speeds are extremely slow and Remote Desktop Protocol (RDP) crashes due to poor connection quality. The investigation carried out by the administrator himself has led him to the conclusion that the origin is in the KB5025305 update.

Other reports indicate that L2TP/IPsec VPN issues are only reproducible if using a Wi-Fi connection and that those using cable have apparently not been affected by slow connection speeds. Microsoft has already stepped in to say that it is aware of the problems and is currently investigating to find a solution.

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As a temporary measure, you can choose to remove the update package that implements the bug, but this also removes the rest of the security and bug fixes that are included in the same package, so it’s not an error. ideal solution.

Microsoft reminds that it “combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). To remove the LCU after installing the combined SSU and LCU package, use the DISM /Remove-Package command line option with the name of the LCU package as an argument. You can find the package name with this command: DISM /online /get-packages ”.

It seems that VPN connection speeds are not the only problem caused by KB5026372, as other users have reported issues with write speeds on SSDs and, in other cases, performance and stuttering in games . That an operating system causes incidents during its life cycle is completely normal, but it is also true that Microsoft has accustomed us to apparently higher numbers with its last two operating systems.


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