This article was previously published under Q257760
This article has been archived. It is offered "as is" and will no longer be updated.
When you use a Windows 2000-based computer, the following error may be logged in the Application event log after every reboot:
Event Type: Error Event Source: perfctrs Event Category: None Event ID: 3101 Date: boot_date Time: boot_time User: N/A Computer: SYSTEM Description: Unable to read IO control information from NBT device.
Another symptom is that the NBT Connections counter is not available in System Monitor, although other counters provided by Perfctrs.dll, such as TCP, are available.
This behavior can occur if the Windows 2000 Transmission Control Protocol/Internet Protocol (TCP/IP) performance counters (Perfctrs.dll) are attempting to extract input/output (I/O) control information from a network device, but no network device (network adapter, modem, and so on) is present.
This problem can also occur if the performance counters attempt to extract I/O control information, but the network stack has not completed loading. This is a timing issue and does not necessarily indicate a problem.
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to obtain the Latest Windows 2000 service pack
To work around this problem, disable the TCP/IP performance counters:
Run the Exctrlst.exe utility from the Microsoft Windows 2000 Resource Kit.
For information about the Windows 2000 Resource Kit, view the following Microsoft Web site: