WAN Miniport (PPTP)

My laptop that runs Vista Home Prem. 32 bit. will not detect any wireless network. When I go to connect to a network the show box is blank. Checking the device manager a warning shows for the wan miniport (pptp). Upon trying to do an update for the device searching online, I get an error message that an error had occurred while installing. The properties box for the device shows Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39). Windows update will show no updates availible for this computer.
 

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Last updated August 25, 2019 Views 55,090 Applies to:

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Hi code8000,

I would suggest you to re-install the WAN miniport driver by following the steps below.

1. Go to device manager and select "Show Hidden Devices" under the
View menu.

2. Expand Network adapters. You should see the WAN Miniport (PPTP)

3. Try right clicking on it and uninstalling it. More than likely it
won't allow you to. To get around this update the driver to something
"uninstallable" like the MAC Bridge. To do this right click on it and
select update driver. Choose no to look on windows update. Then choose
to specify a location. Next choose dont search. Next unselect show
compatible hardware and find the MAC Bridge under Microsoft. Force it
to install it. After thats done you should be able to uninstall your
new 'MAC Bridge Miniport."

4. Now that it's gone, lets reinstall it. Now get the devcon.exe
package from the link below http://support.microsoft.com/kb/311272 and extract
it desktop or c:drive.

5. Go to the command prompt (Run it in administrator mode) / console (cmd.exe) and get to the folder with devcon.exe in it.

6. Run this command: devcon.exe install c:\windows\inf\netrasa.inf
MS_PptpMiniport

7. Go back to the device manager. You should see the WAN Miniport
(PPTP) back.

This should do it.

Troubleshoot problems finding wireless networks

http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-problems-finding-wireless-networks

Post your results back.
Mouneshwar R – Microsoft Support
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I had right clicked on command prompt and clicked on run on administrator. When I try to type the install command in, I receive the message: 'devcon.exe' is not recognized as as internal or external command, operable program or batch file.

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So much for help here. Will have to find help somewhere else. Will still not reinstall. Sounds like will have to wipe drive and reinstall everything from scratch.

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I was servicing a PC that got hit my countless viruses and malware; it made disasters to it as far as not even letting it start through Safe Mode by a registry key deletion.

In this particular case it also managed to corrupt the network drivers for the PC, but once I restored the registry keys for Safe Mode I was able to fix that up.

Nevertheless, the WAN Miniport (this case IP, not PPTP) was still corrupt and, even though this doesn't use this Networking app, I wanted to leave this PC speckless and problem-less for anything else.

This method worked, instead using MS_NDISWANIP.

Thanks for the help.

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It was worth the try, but the same error message was recieved.

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I had to go through this process for Windows 7, 64 bit.

I had to obtain devcon.exe by installing the Windows Driver Kit (WDK) and using the copy in 8.0\Tools\x64.  The more commonly found devcon.exe will fail with a terse, unhelpful message.

I installed each of these hardware ID's using "devcon.exe install c:\windows\inf\netrasa.inf <hardwareId>":

MS_AgileVpnMiniport
MS_NdisWanIp
MS_NdisWanIpv6
MS_L2tpMiniport
MS_NdisWanBh
MS_PppoeMiniport
MS_PptpMiniport
MS_SstpMiniport

After adding these, Device Manager showed them as "Unknown Device".

After a reboot, Windows attempted to install drivers for these.  It reported failure for each, but still, Device Manager showed the proper Display Name for each of the above.

My first attempt at using VPN failed due to Network Access Protection (NAP) not getting info it wanted.  The second attempt succeeded.

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I have Windows 7 64bits, when I use devcon.exe to install wan minport ip & Pptp I got the following message :
device node created. Install is complete when drivers are installed ...
Updating drivers for MS_PptpMiniport from c:\windows\inf\netrasa.inf.
devcon.exe failed.
Can you please advise what's going wrong ?

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Hi Dolce,

 

Considering the age of the thread I would suggest that you create a new thread with more information to avoid any confusion.

 

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Im having the same problem after Symantec End Point - Network threat protection got corrupted. Symantec was able to help me remove there stupid teefer2 drivers and I was able to reinstall the main network drivers, but not the Wan Miniport ones. :( I really hate Symantec right now!

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Hi code8000,

I would suggest you to re-install the WAN miniport driver by following the steps below.

1. Go to device manager and select "Show Hidden Devices" under the
View menu.

2. Expand Network adapters. You should see the WAN Miniport (PPTP)

3. Try right clicking on it and uninstalling it. More than likely it
won't allow you to. To get around this update the driver to something
"uninstallable" like the MAC Bridge. To do this right click on it and
select update driver. Choose no to look on windows update. Then choose
to specify a location. Next choose dont search. Next unselect show
compatible hardware and find the MAC Bridge under Microsoft. Force it
to install it. After thats done you should be able to uninstall your
new 'MAC Bridge Miniport."

4. Now that it's gone, lets reinstall it. Now get the devcon.exe
package from the link below http://support.microsoft.com/kb/311272 and extract
it desktop or c:drive.

5. Go to the command prompt (Run it in administrator mode) / console (cmd.exe) and get to the folder with devcon.exe in it.

6. Run this command: devcon.exe install c:\windows\inf\netrasa.inf
MS_PptpMiniport

7. Go back to the device manager. You should see the WAN Miniport
(PPTP) back.

This should do it.

Troubleshoot problems finding wireless networks

http://windows.microsoft.com/en-US/windows-vista/Troubleshoot-problems-finding-wireless-networks

Post your results back.
Mouneshwar R – Microsoft Support
-------------------------------------------------------------------------------------------------------------------
Visit our Microsoft Answers Feedback Forum and let us know what you think

[If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]
Hi Mouneshwar R,
thank you for your help... but when i'm trying to install devcon.exe in cmd.exe or command prompt as you said, it says :" devcon.exe failed." :(
what should i do now??
Please reply if you could help me solve my problem... I've uninstalled the wan miniport (pptp) driver as you mentioned and now i'm worried if it harms the system or something ...

I did completely as you taught, and step by step,..., but it didn't work for me....
I really need your help ................................................................

Thanks...

MMÇ
Mehemmed Me'rifet

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