Re: Win Error Code 12 in the devmgmt.msc after installing ten vmxnet3 Adapters

Yes, i've removed all old/hidden devices from the device manager.

I started the device manager like this way:

1. Click Start> Run, type cmd.exe, and click OK. The Command Prompt window opens.
   
2. Run this command:
   
   set devmgr_show_nonpresent_devices=1
   
   
   
3. Run this command to start Device Manager from this Command Prompt:
   
   devmgmt.msc
   
   
   
4. Click View> Show Hidden Devices.
   
5. Expand the Network Adapters tree.
   
6. Right-click the dimmed network adapter and click Uninstall.
   
7. Close the Device Manager.
   

Note: In Windows 2008 and Windows 7, open the command prompt using the Run as Administrator option.