If you purchase any computer from OEM manufacturer like Dell, HP, Acer and so on, it comes pre-installed with OEM version of Windows 7. Having said that, the motherboard of such computers contain OEM information (SLIC 2.1), which is used to legally activate Windows. What about the after-market motherboards, purchased separately from computer stores, like the ones from ASUS or MSI? Do such motherboard contain SLIC table, originally included by the manufacturer of the motherboard (not added by end users afterward)? Assuming that I want to install such motherboard in my computer and refuse to use any BIOS mod or loader, I can only use the retail version of Windows 7. Is this correct? In other words, if I want to legally use the OEM version of Windows 7, again without any BIOS mod or loader, I am forced to use only OEM PC. Any custom-made computer is out of question, right? Yes, I am fully aware that there is virtually no difference in functionality between the OEM version and Retail version, other than the activation method. The problem is that the retail version requires internet for activation upon completion of Windows install. Since I am using RT 7 Lite to slim down Windows, I would need to perform clean install every few weeks or so, for trial and error. As I do not have internet access in my hometown, only the OEM version can be used, so that it can be activated without internet access. Thank you for the information given.