Microsoft KB Archive/195339

= Stop 0xa Using NetSupport PC-Duo =

Article ID: 195339

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q195339



SYMPTOMS
On a computer running Windows NT and NetSupport PC-Duo, the system fails with a STOP 0x0000000A. This STOP error may happen even when you have not used PC-Duo for a while.



CAUSE
GDIHOOK is a kernel-mode driver installed by PC-Duo. Gdihook4.dll allocates a mutex in paged memory. After several days of (remote control) inactivity, or less on a computer that is short of memory, the mutex can be paged out of physical memory. If Gdihook4 then attempts to access the mutex from a high IRQL, the system will be forced to STOP.



RESOLUTION
This problem has been fixed in later versions of PC-Duo. The current release, v3.72, has been tested with Windows NT 3.51 SP5, Windows NT 4.0, and Windows NT 4.0 SP1, SP2, and SP3. Support for Windows NT 3.50 was withdrawn after v3.60. The product is available in Germany under the name REMCON PC-Duo.

NOTE: To deactivate PC-Duo, it is not sufficient to disable the Client32 service. The problem described here is caused by a kernel-mode driver that can only be removed by completely uninstalling the product.



MORE INFORMATION
The product included here is manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Additional query words: pc duo pc-duo remote stop 0xa gdihook4

Keywords: kbprb KB195339

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