NetBT.sys driver won#t load - EventID 7026

lophiomys · 25 May 2011

Windows 7 Home Premium SP1 x64, all updates, SFC OK
Acer X3900

Hi,

How can one repair or load the netbt.sys driver?

It seems that after an automatic Windows Update the netbt.sys
driver ceased to load. From that day mapping network drives
on an Windows 2000 PC stopped to work. The Win7 PC is also
invisible on the Windows network. Internet and Ping works though.

Strange thing is that System File Check (SFC) reports everything fine.

EventIDs 7026, 7001, 7001
Source: Service Control Manager

As a consequence the "TCP/IP-NetBIOS" Helper Service also fails to load.

Any hints would be highly appreciated.

lophiomys · 30 May 2011

Anyone having an idea?

I have an older version of netbt.sys from a backup, but so far I could not find a method to re-install it.
Nor matter what I try (Save Mode, Recovery Console, privileged console) Win7 tells me I would not have
access rights to C:\Windows\System32\Drivers\...

What would be the standard procedure to be able to override netbt.sys with an older version?

Jacee · 30 May 2011

Are you using Norton/Symantec?

lophiomys · 31 May 2011

No, Norton and McAffee are the first things scrubbed off the machine.
Windows Firewall and Avira Antivirus are disabled.

lophiomys · 01 Jun 2011

The problem was finally solved by restoring from an older backup, while having some data loss.
Now - before and after 55 Windows 7 updaes - everything including Window Networking (Workgroup)
is working properly.
Very strange.