Nearly 50 Million PCs at risk due to another Windows 10 update bug

Windows 10 latest update has a bug that could break VPN services

Last week, Microsoft had released a new cumulative update ‘KB4501375’ (OS Build 18362.207) for its recently released Windows 10 May 2019 Update that offers a lot of bug fixes and performance improvements.

The company also disclosed a significant vulnerability in version 1903 that has the potential to affect a staggering 50 million PCs around the world that runs Windows 10’s latest version. However, the good news is that the bug has not affected Windows 10 version 1809, 1803 and older versions.

According to Microsoft, the bug breaks down the Remote Access Connection Manager service (aka RASMAN) and hampers the operation of VPN (Virtual Private Network) services.

Also read- Windows 10 Update Breaks Bluetooth Device Connectivity

For the uninitiated, Windows 10 uses RASMAN to manage connections to a VPN and it is an essential background task for VPN services to function normally.

“The Remote Access Connection Manager (RASMAN) service may stop working and you may receive the error “0xc0000005” on devices where the diagnostic data level is manually configured to the non-default setting of 0. You may also receive an error in the Application section of Windows Logs in Event Viewer with Event ID 1000 referencing “svchost.exe_RasMan” and “rasman.dll”, Microsoft warns on an updated support page.

However, RASMAN may not crash if you configure a VPN connection and use it in manual mode.

“This issue only occurs when a VPN profile is configured as an Always On VPN (AOVPN) connection with or without device tunnel. This does not affect manual only VPN profiles or connections,” Microsoft added.

However, Microsoft has provided two workarounds for the issue available, which can be done by manually configuring the default telemetry settings by modifying Group Policies or Windows Registry.

In order to fix RASMAN error 0xc0000005 with Group Policies, you need to follow these steps:

  1. Browse to the following path: Computer Configuration\Administrative Templates\Windows Components\Data Collection and Preview Builds\Allow Telemetry.
  2. Change the value of Safe Policy Setting to Enabled and set it to 1 (Basic) or 2 (Enhanced) or 3 (Full).

Alternatively, you can also fix RASMAN error 0xc0000005 with Windows Registry:

  1. Launch SubKey Windows Registry and browse to the following location: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DataCollection.
  2. Look for entry ‘AllowTelemetry’. (In the event, the AllowTelemetry does not exist, you can create it manually by right-clicking the right-pane blank area and creating REG_DWORD named ‘AllowTelemetry’).
  3. Then, enter value 1, 2, or 3 for Basic, Enhanced, and Full respectively.

Note: If the RASMAN is not running after setting the Group Policy or Registry Key, you will need to manually start the service or restart the device.

If you do not wish to follow the above two alternatives, then you can simply roll back Windows 10 to the previous update. To do this, just click the Start button, then select Settings, Update & Security, Windows Update, View update history and Uninstall updates. Select the update you want to remove, then select Uninstall.

Microsoft says it is already working on a resolution which should be available in the end-July update to Windows 10. So, it is advisable to wait until Microsoft fixes the issue.

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