I have installed ubuntu server on Widows 8.1 Hyper-V virtual machine. As part of learning I just want to remove the ubuntu server completely sothat I can reinstall the server once again to get a better understanding on the installation process. If I delete the Virtual Machine (By remove option in Hyper - V) I am able to delete the server and the hard disc where the server is installed. But, Using this process my Host OS Windows 8.1 is getting corrupted and had to reinstall the Windows OS (Tried this 3 times already). Can someone please tell me the right way of uninstalling the ubuntu server from the Hyper-V virtual machine. Thanks, Uday