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Oracle Virtualbox made the NIC stop working on Server 2008 64-bit

All,

I had installed Virtualbox on a Windows 2008 Server that already had Hyper-V installed. After researching I discovered that I couldn't run Virtualbox (kept getting error about VT-x not enabled) with Hyper-V installed because Hyper-V took control of the virtual features. I uninstalled Hyper-V and when I rebooted, the server wasn't on the LAN. Since I was remotely connected, this was a problem. I talked my client through uninstalling Virtualbox, reset the tcpip stack etc. It kept saying that there was an IP conflict on the network. I finally had her uninstall MS Security Essentials and after rebooting, everything worked again. So, thinking that Security Essentials was the problem, I reinstalled Virtualbox. I was disconnected again and haven't been able to reconnect since. I had her uninstall the network adapters, reinstall then uninstall Virtualbox but no joy. Same with resetting the tcpip stack and winsock again. There are no virtual adapters left even after having her show the hidden devices in Device Manager. The network connection now has the red "X" on it and says it can't connect to the network. I had her switch cables (just in case that was the problem) but the same outcome. The server is in a small office and is the DHCP / DNS / Domain controller and they are 6 hours from my location. I was hoping that one of you Guru's could point me in the right direction. I even had her remove all the related folders (Program Files\Oracle and the folder that I had put the VM's in), I am guessing that the uninstaller left some remnant behind in the registry but I don't have a clue as to where it may be. Any help would be greatly appreciated ...

Thank you in advance
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
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Commented:
can the server ping itself?

does it have an IP address?

the fact its a DHCP, DNS and Domain Controller makes things very difficult?

do you have a backup, before you installed Virtualbox?

Is there another DC?

Author

Commented:
Thanks for responding.  This is a single server environment.  I have a backup but the closest backup has the virtualbox installed AND Hyper-V.  Yes I had her manually add the IP address back to it which is 192.168.1.5.  It can't ping itself but can ping the loopback adapter.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
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Expert of the Year 2017

Commented:
What I was going to suggest is to remove the network adaptor, and let it rebuild, and then re-add IP, but with it being a DC, DHCP, DNS, it's very messy.
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Commented:
I've requested that this question be closed as follows:

Accepted answer: 500 points for hanccocka's comment #37075367

for the following reason:

This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

Author

Commented:
I discovered the hard way that Oracle Virtualbox AND Hyper-V can't reside on the same server.  The Hyper-V takes precedence with the hardware virtual capabilities.  I disabled Virtualbox and just used Hyper-V.  Thank all of you for responding but the final "solution" (or workaround) was to disable Virtualbox and use Hyper-V.  I think that uninstalling Hyper-V would have worked but my client is a 6 hour drive away and this worked without needing me to travel.

Author

Commented:
As stated above, I found a work around and with my client so far away, it is functional and that is acceptable to me.
Commented:
I figured out a work around myself.  What hanccocka suggested wasn't possible in my situation because my client is 6 hours away.  I want to reject his answer and simply close this question.  I don't even want the points I just want this closed.  I posted what I did.

Author

Commented:
I figured out a work around myself.  What hanccocka suggested wasn't possible in my situation because my client is 6 hours away.  I want to reject his answer and simply close this question.  I don't even want the points I just want this closed.  I posted what I did.

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