Article ID: 141299 - View products that this article applies to.
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IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information on how to do this, view the "Restoring the Registry" online Help topic in Regedit.exe or the "Restoring a Registry Key" online Help topic in Regedt32.exe.
As a test procedure or if you are experiencing bus contention with your 3Com 3C590 PCI or 3c595 (10/100 mb/sec) network cards, you can disable bus mastering to alleviate busmaster contention, or to test whether busmaster contention is the cause of your problems. This procedure can also be used with other PCI bus Network Interface Cards but you may not receive the listed notification in event viewer.
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.
For information about how to edit the registry, view the "Changing Keys And Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" online Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.
To disable bus mastering:
The driver name is 3C59XN.EXE.
The 3C590 is manufactured by 3Com, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.
Article ID: 141299 - Last Review: October 26, 2013 - Revision: 3.0