Stop 0x50 on Windows Server 2008 R2 with RealVNC VNC Server 4.6

Applies to: Windows Server 2008 R2 StandardWindows Server 2008 R2 EnterpriseWindows Server 2008 R2 Datacenter


When you log off a Windows session on a Microsoft Windows 7 or Windows Server 2008 R2-based computer, you may receive an error message that resembles the following:

STOP: 0x00000050 (0xffffffff'ffffffd0, 0x00000000'00000001, 0xfffff800`02cdda4c, 0x00000000'00000000)


This issue occurs because of a race condition that occurs in the Win32k.sys driver. The race condition occurs when you use RealVNC VNC Server 4.6 and logoff a Windows session while a VNC viewer is connected.


To resolve this issue, contact RealVNC to obtain a fix for the issue.

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

More Information

To work around this issue, remove RealVNC VNC Server from the computer.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.