What is CBL-UNPL-FLS?
False report of unplugged network cable is a medium-severity network adapter issue. The NIC reports 'Cable disconnected' even though the cable is physically plugged in. Common triggers are ISP Provider Error, corrupt network card driver, stuck Router and IP address conflict. The steps below are ordered to resolve this efficiently.
Common Causes
- ISP Provider Error
- Corrupt network card driver
- Stuck Router
- IP address conflict
Step-by-Step Fix Guide
-
1
Restart the router (turn off for 1 minute)
Most reports of CBL-UNPL-FLS clear up after Restart the router (turn off for 1 minute), so it's worth trying before anything more involved.
-
2
Reset complete network settings in Windows
For the minority of cases that need more work, the later steps dig into less usual network instability causes.
-
3
Change the DNS servers to 8.8.8.8
Still seeing CBL-UNPL-FLS after that? "Change the DNS servers to 8.8.8.8" is the next thing to check.
Commands & Diagnostics
ipconfig /release
ipconfig /renew
ipconfig /flushdns
netsh winsock reset
Frequently Asked Questions
CBL-UNPL-FLS is most often triggered by ISP Provider Error. Other reports point to corrupt network card driver, stuck Router and IP address conflict as contributing factors.
Most CBL-UNPL-FLS reports resolve after "Restart the router (turn off for 1 minute)". The rest of the guide above is there for the cases that don't.
CBL-UNPL-FLS is a medium-severity issue. It can affect system stability, but the fix steps above typically resolve it without lasting damage.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Still Need Help?
Search our full database of 535+ documented PC errors for more solutions and step-by-step repair guides.
Search Error Database