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After making some modifications to your Windows 2008-R2 you restart your server and receive the error message ‘BootMGR is missing press Ctrl+Alt+Del to restart’. Not good when this is a production server running multiple VM’s using MS Hyper-V technology. No sweat! Let’s get that server up and running.
1. Before proceeding, you will need a Windows 2008-R2 installation DVD. 2. Boot from Windows 2008-R2 using your installation DVD. 3. Click next at the prompt asking for your language to install, time and currency, etc. 4. Now click on the Repair your computer located at the bottom lower left corner. 5. The installation DVD will try to find your Windows 2008-R2 installation directory. Select the installation you would like to repair. If no installation appears, you may need to install the hard drive drivers. Click Next. 6. Click the open command prompt and type the following commands: a. Bootcfg /rebuild b. Bootcfg /fixmbr c. Restart your server 7. After restarting your server one of two things will happen: a. Your Windows server will load or, b. You will still receive the same error (bootmgr is missing, etc). 8. If your server loads great, go to step 12! If not, continue reading. 9. Find a Windows Vista or Windows 7 DVD and follow steps 1 thru 5 listed above using the Vista or Windows 7 DVD instead of the Windows 2008-R2 10. Click on Startup Repair and Vista or Windows 7 will try to repair the boot and ask you to restart when the process is complete. 11. You should now be able boot your Windows 2008-R2 server. 12. Now open your Hyper-V admin console and start your VM’s. If the VM’s start Great, You’re Done! If not continue reading. 13. If you receive an error when trying to start your VM’s enter the following command:
14.Your Virtual Machines should now start after restarting your server.
Helpful links: http://technet.microsoft.com/en-us/library/cc749177%28WS.10%29.aspx |
October 28, 2010
MTirado 
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