Windows Server 2025 Security Update Freezes Remote Desktop Sessions Connection

A recent security update for Windows Server 2025, released on February 11, 2025 (KB5051987), has caused a significant issue for users relying on Remote Desktop Protocol (RDP).

The update, part of Microsoft’s February Patch Tuesday, has led to RDP sessions freezing shortly after connection, rendering mouse and keyboard inputs unresponsive.

Microsoft has confirmed this problem, which affects both Windows Server 2025 and Windows 11 version 24H2 systems.

The Issue

After installing the KB5051987 update or subsequent updates, users report that their RDP sessions freeze within moments of connecting.

Input devices such as the mouse and keyboard become unresponsive, forcing users to disconnect and reconnect to regain functionality. This issue is particularly disruptive for IT administrators and organizations that depend on remote access for daily operations.

The problem manifests across various scenarios, including:

• Sessions freezing on the login screen or during active use.
• Users needing multiple reconnection attempts to establish a stable session.
• Increased frustration in environments with high dependency on RDP.

Microsoft has acknowledged the issue and provided a partial resolution for Windows 11 version 24H2 through an optional preview update (KB5052093) released on February 25, 2025. However, a fix for Windows Server 2025 remains pending.

The company has assured users that a resolution will be included in an upcoming Windows update, though no specific timeline has been announced.

In the interim, affected users are advised to disconnect and reconnect when freezes occur. For organizations seeking immediate relief, modifying Group Policy settings related to RDP network detection has proven effective in some cases.

Steps include enabling “Select network detection on the server” under the Remote Desktop Session Host settings.

This issue is not isolated. Similar RDP-related problems have been reported across various platforms following recent updates. For instance:

• Disconnections lasting up to 65 seconds when using UDP-based connections from Windows 11 version 24H2 devices to older servers.
• Issues with USB printers and network shares were introduced by other updates earlier this year.

Microsoft has utilized Known Issue Rollback (KIR) to address some of these problems but continues to work on permanent fixes.

The freezing issue has sparked frustration among IT professionals and end-users alike. Online forums are filled with reports of repeated connection failures, with some users resorting to uninstalling updates or rolling back systems to restore functionality.

While Microsoft works toward a permanent solution, organizations are encouraged to monitor release notes for upcoming updates closely. Administrators may consider delaying non-essential updates in environments where RDP is mission-critical until fixes are confirmed.

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