I have a new custom build HP Envy desktop arriving real soon. Am I able to do a clean install of Windows 8? Or is it to tricky to even attempt? I am actually hoping it comes with 8.1 since the estimated ship date is the 23rd. If a clean reinstall can be pulled off. I have my Windows 8 Pro cd from my other machine. My new HP is coming with the standard version of Windows 8. So, don't know if the Pro disc would work by just unlocking the standard version.