Manual:CHR Hyper-V installation
Choose to make new Hyper-V guest
"Generation 1" should be used for RouterOS guests
Select amount of RAM available for the guest, deselect dynamic management
Choose networking capabilities for your new router.
Do not create a new drive for the guest, instead, select option - "Use existing disk" and browse to the download folder where you have downloaded the VHDX image from the MikroTik download page.
Select the downloaded image file.