Creating a Hyper-V VM

On the server management page, click Hyper-V Manager. Right-click the target Hyper-V host and choose New > Virtual Machine.
In the displayed New Virtual Machine Wizard dialog box, you can click Finish to create a VM with default configurations or click Next to create a VM with custom configurations. In most cases, the second method is used.
In the Specify Generation dialog box, select Generation 1 (default). The first-generation VM inherits the virtual hardware of Windows Server 2012 and has good compatibility. It is also the most widely used VM.
In the Assign Memory dialog box, select Use dynamic memory for this VM. If you do not select this, the value of this parameter is the static memory of the VM.
In the Configure Networking dialog box, select the Hyper-V vSwitch from the Connection drop-down list.
In the Connect Virtual Hard Disk dialog box, retain default option Create a virtual hard disk and create a virtual disk in VHDX format that can be dynamically expanded.
In the Installation Options dialog box, retain the default option Install an operating system later. You can select an ISO image that has been downloaded to install an OS for the VM.
In the Summary dialog box, you can view the VM configurations. To change the configuration, click Previous. After confirming all configurations, click Finish.