Here are some tips I found for speeding up the performance of a virtual disk, in my case I am using vmdk files on VMware Workstation
I headed to the familiar ‘Turn Windows Features on or off’ dialog, and tried installing Hyper-V Core, but this was disabled… further digging around unearthed some unpleasant details.
Hyper-V Core, the integral part of Hyper-V, requires a new virtualisation processor feature known as SLAT. Microsoft has documented a list of SLAT-Capable cpus here -> http://social.technet.microsoft.com/wiki/contents/articles/1401.aspx
Unfortunately mine is not listed there.
So if anyone was planning (as was I) to install the Dev Preview and have a VM of Windows 7 running on it, think again, and try an alternative solution, such as Oracle’s VirtualBox.