Looking for info on how to upgrade from Win7 Home to Win7 Professional. The info I could find related to this at Microsoft either did not apply or did not work. Here's what I am trying to do: My PC is a home build with Windows 7 Home OEM. I would like to upgrade to Windows 7 Professional to have more control over user accounts and access to drives and programs. I attempted to use Anytime Upgrade, but received message that this wasn't available - reason was not clear. All attempts to follow links to MS site resulted in options for upgrading to Windows 8/8.1. I have not been able to find a way to purchase Home to Professional upgrade. My question is, which options do I have, and which is the best/easiest/least expensive to use: 1) Purchase Win7 Professional OEM and do a clean install (or upgrade) 2) Purchase Win7 Professional Retail and do a clean install (or upgrade) Would appreciate any help.