To forcely kill that VM:
- Login to the XenServer console where the VM is hosted
- Get the VM Dom ID
xe vm-list name-label={VM Name} params=dom-id
- Get the list of live domains and see if the Domain ID of your VM is listed there
list_domains
- If your Domain ID VM is there, run the killing script
/opt/xensource/debug/destroy_domain -domid <dom id>
- Do another list_domain to check the Dom ID is gone
- Reset the power state of that VM
xe vm-reset-powerstate vm={VM Name} force=true
- If that still does not work do
xe-toolstack-restart
