How to restore services if your Hyper-V host goes down all of a sudden. It can be something like, the server is not booting up after a reboot, showing that operating system not found. This can be due to many reasons. But, you have to find a work around to fix this and to restore the services which were running before. There may be a few VMs running on that host and you have to find a solution to bring those VMs up and running.
If you don't have much time to troubleshoot and fix this, the best possible option is to copy those VM files to another Hyper-V host (if you have another Hyper-V hosts running with enough resources). In this case, you can try using a Linux live CD/ DVD (say CentOS or Ubuntu), to boot from the CD/ DVD. Once it boots up, you can see your drives and VM files, copy it to another Hyper-V host. Once copying is done, you can import the VMs using Hyper-V manager and power it on.
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