Session "NetCfgTrace" failed to start with the following error: 0xC0000035

Peskycross 50 Reputation points
2026-10-12T13:18:54.76+00:00

Getting a flood of Error 2's with the above details.

I've got a Realtek PCIe 2.5GbE NIC with the most recent driver. Checking through things in services, event logs, device manager, nothing is sticking out as wrong but this error keeps filling up the event log and now internet browsing and gaming is slow/laggy.

I've tried the network reset commands:

netsh winsock reset

netsh int ip reset

ipconfig /flushdns

ipconfig /release

ipconfig /renew

Windows for home | Windows 11 | Internet and connectivity

4 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Peskycross 50 Reputation points
    2026-10-17T01:06:08.5233333+00:00

    Porblem is not resolved, keep getting the same error "Session "NetCfgTrace" failed to start with the following error: 0xC0000035"

    Was this answer helpful?

    0 comments
  2. TaoLi 116.8K Reputation points Independent Advisor
    2026-10-13T12:26:42.13+00:00

    Thanks for the update! Yes, Network reset in Settings goes further: it removes and reinstalls network adapters and restores their settings to defaults. The commands you ran reset Winsock, TCP/IP, DNS and the IP lease, but don’t reinstall the adapters.

    That explains why the results can differ. Since the issue is resolved, no further troubleshooting is needed.

    Was this answer helpful?

    0 comments
  3. Peskycross 50 Reputation points
    2026-10-12T15:14:35.5433333+00:00

    Network reset within settings solved the issue. CMD commands did not. I'm not sure if I missed a command from above or network reset does more than the commands above but issue is now resolved

    Was this answer helpful?

    0 comments
  4. TaoLi 116.8K Reputation points Independent Advisor
    2026-10-12T13:54:19.3066667+00:00

    Hi, this error points to a duplicate logging session, but it doesn’t necessarily explain the lag.

    Since the network resets didn’t help, try a clean boot to check for background software conflicts. Follow this guide, then check whether browsing improves and new errors stop appearing:

    https://support.microsoft.com/en-us/windows/experience/startup-boot/how-to-perform-a-clean-boot-in-windows

    If it still happens, what’s your exact Realtek driver version, and did the lag start after an update?

    Was this answer helpful?

    0 comments

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.