Hi Friends:
According to the new MS OEM EULA one must be a "system builder" to install the software on a machine. And, a system builder can be an end user. To be a system builder, one now has to be an "original equipment manufacturer, an assembler, a refurbisher, or pre-installer of software on computer systems". I think that many, who buy pieces (perhaps a single piece) of hardware, for an existing computer system may qualify as system builders under the "refurbisher" category. So for a DIYer to qualify as a "system builder," he or she would need to be assembling a computer or refurbishing one.