FYI - Windows Vista, Windows 7, and Windows Server 2008/R2 keys are not media specific. You may use any disc with any key (OEM, retail, upgrade, VL) and the software will "convert" to the version that corresponds witht the key.
I can vouch for that being the case with Windows 7 OEM and retail CD's and Windows 7 OEM and retail keys I have. I don't have to use my trusty O.E.M. re-installation CD as I had to use for XP Pro OEM keys on the back of Thinkpads and then a retail XP Pro CD for CD keys I have. Also can vouch for the fact that the same key will activate Windows 7 32-bit or Windows 7 64-bit versions. I just installed Windows 7 Professional 64-bit using the C.O.A. on my newly acquired W500 and I'm so glad I did. First time for me using a 64-bit operating system. Being able to utilize more than 3GB memory is great, and I haven't encountered any problems at all with software I have not functioning properly under a 64-bit OS. I never use recovery CD's when setting up machines. My W500 came with a 160GB hard drive loaded with Windows 7 (32 bit) already installed, and a lot of Lenovo clogware. I removed and stored away that drive for a rainy day. I did a clean, streamlined Windows 7 (64 bit) installation on a 500GB hard drive. I had no problem activating online. When people have to "call in" it's usually because that key has been activated before, activated on more than 1 machine, installed and then uninstalled, or moved a hard drive from one computer to another (which I do a lot when testing laptops). So then Windows will detect a hardware change and require call-in reactivation. I've "called in" MS activations many times. So many times that I have MS Activation as one of my speed dials LOL. Hey, no use wasting a good key just because MS wants to give you a hard time and make you punch in a hundred numbers. BTW, this machine runs like a champion under W7 64-bit. I can see why people call the W500 a workhorse
240, 380Z, 390X, 570E, 600x, 701C("The ButterFly"), 770, A20...22,31, G40,41,
R32,40,50,51,52, R60,61, SL410/510,T20...23,30,40...43, T60p UXGA,T61,T400,
TransNote, X20..24,31,40,X41T,X60,61,X60/61T, Z61t, W500
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