HALP !!! Think I borked my Server 2008 R2 install

[Fritz]

I tried to install Hyper V and something went wrong. The computer hung and then rebooted. Now, every time it starts, Server Manager tries to pick up where it left off. It does this whether I open it or not. Same result, computer hangs and then reboots, rinse and repeat. How can I stop Server Manager from picking up where it left off and how can I undo the Hyper V install. I started in safe mode and disabled all Hyper V services but no joy.

 

[j_h_o]

Last Known Good configuration should be fine, since the server doesn't boot all the way up again.

You've tried this and it doesn't work?

 

[Fritz]

It does boot all the way up but shortly thereafter is when it freezes and reboots. I can get into safe mode but don't know how to cancel the Hyper V install.

 

[pricklypunter]

I'm not 100% sure on this, so ymmv. Start up, hit F8 and get to a command line/ prompt. Type in
servermanagercmd -remove hyper-v

You will need to restart after it has removed the role.

 

[Fritz]

Thank you sir. But now I'm in a catch 22. The command prompt you get with F8 is a safemode command prompt and server manage is dead in safe mode.

 

[pricklypunter]

I think it can also be removed using Dism.

I'm not 100% sure of the syntax, but it's something like dism /online /disable-feature /featurename:Microsoft-Hyper-V /featurename:Microsoft-Hyper-V-Management-Clients

If that doesn't work, you might need to point it to an image rather than using /online, something like dism /image path\ /disable-feature /featurename:Microsoft-Hyper-V /featurename:Microsoft-Hyper-V-Management-Clients

 

[Fritz]

the dism command didn't work. Got a cryptic error message. Decided to nuke it and load 2012 R2 like I should have done to begin with.

 

[Jerry Renwick]

good luck