I want to apologize in advance for probably asking a question that's been asked 1000 times, I have read through the stickies and I have been searching for a while, and I think I'm just in acronym overload - it isn't making sense. I have built a server for a client from scratch, I am purchasing 2008R2 OEM from newegg, and I have already installed 2008R2 from a disk I already have, but it is a retail disk. I thought it was OEM. When I get the OEM disk from newegg, can I easily activate my installation as I have already begun configuring it? I believe the answer is yes, but when I was reading through the other threads, it just simply got confusing. Pretend you're dealing with someone who knows what they're doing just not in this area... lol.