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Solved netsh cannot find loopback adapter anymore after update

nuclear898

New Member
Hello,

for a while I've been using netsh to add some IP addresses to the standard windows loopback adapter (interface idx=1) which worked fine until today when I ran windows update.

I have always used this command to assign my loopback adapter an extra IP:
netsh int ip add addr 1 address=111.111.111.111 mask=255.255.255.0 st=ac
(using an example IP address)

But since installing the updates, this returns the following error message:

Failed to configure the DHCP service. The interface may be disconnected.
The system cannot find the file specified.

However, when I do "netsh int ip show int" it clearly shows the following interfaces:
Idx Met MTU State Name
--- ---------- ---------- ------------ ---------------------------
1 50 4294967295 connected Loopback Pseudo-Interface 1
3 25 1500 connected Wi-Fi
4 5 1500 disconnected Local Area Connection* 2

and it's not disconnected at all. The only fix I have found so far was reinstalling windows 8.1 and not installing any updates... I just installed the updates again and it stopped working.

Any help would be greatly appreciated. I'm seriously contemplating on going back to windows 7, windows 8 has given me nothing but trouble as a power user so far...
 

My Computer

System One

  • OS
    Win8

MasterChief

Banned
Hey,

Off the top of my head...but doubtful it's gonna help...

Did WU ask to reboot and you declined to do so as of yet?

Can't hurt none to run an sfc /scannow command and also to ensure the latest adapter driver is installed.

I understand it's an issue with when an update was applied, but these things may help nonetheless.

If not, I think you'd be most successful by trying to figure out exactly which file it is complaining that it can not access or find. Maybe a permissions thing or maybe some file really is missing. Event logs? I dunno.
 

My Computer

System One

  • OS
    7601.18247.x86fre.win7sp1
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nuclear898

New Member
Thanks for your reply, I did reboot after updating, that didn't help.

I just found a solution, I fixed it with this:

"netsh interface ip set dns 1 dhcp"

Appearantly one of the updates messes with the dns settings.
 

My Computer

System One

  • OS
    Win8

tigwo

New Member
Thanks for contributing your solution.
Is it possible to set an IP address twice in the system or does it make problems?
I want to set the static IP address 192.168.1.1 to "Local Area Connection*2" and "Loopback Pseudo-Interface 1"
If you start the computer and "Local Area Connection*2" is not connected than the IP 192.168.1.1 would not be accessible. But maybe with "Loopback Pseudo-Interface 1" having the same IP there is alwas a connection available. Is that a solution?
 

My Computer

System One

  • OS
    windows

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