It is better to try out window 8 on a VHD as the performance hit will be only on the HDD, rest everything will be on the actual hardware.
To install windows8 we can either burn a DVD or create a flash drive and install from it, here I’m using a flash drive.
To create a Win8 Flash installer media you can download Windows 7 USB/DVD download tool
You can either burn a dvd or copy the contents in the image using the above tool, like Win7 the flash drive should be above 4GB.
When using DISKPART command we need open cmd prompt with administartive privilages.
To do so, Start > type “cmd” Ctrl+Shift+Enter/ right click and run as administrator.
Microsoft DiskPart version 6.1.7601 Copyright (C) 1999-2008 Microsoft Corporation. C:\Windows\System32>diskpart DISKPART> create vdisk file=d:\VMs\Win8.vhd type=expandable maximum=40000 100 percent completed DiskPart successfully created the virtual disk file. DISKPART> select vdisk file=d:\VMs\Win8.vhd DiskPart successfully selected the virtual disk file. DISKPART> attach vdisk 100 percent completed DiskPart successfully attached the virtual disk file. DISKPART> create partition primary DiskPart succeeded in creating the specified partition.
We can also do the following step using disk management too.
Boot from the Win8 installation media.
When the installation prompts to select drive to install hit on SHIFT+F10 , on the console use the following diskpart commands to mount the VHD which we have created.
DISKPART> select vdisk file=d:\VMs\Win8.vhd DISKPART> attach vdisk
Now hit on ALT+TAB and switch to the list of disks and hit on refresh, now the VHD will be listed.
Please note: There will be a warning message saying the VHD can’t be booted to
After a while it will ask you for restart, after restart you may remove the installation media. System will reboot and continue installation from the VHD.
Also note that like windows 7/Vista we don’t need to create BCD entry for VHD, it will create a GUI boot menu automatically.