Hello. I've got a problem with Win7 Ultimate Retail on Toshiba Laptop. I've been using Windows 7 RTM Retail version on my PC for a long time. I activated it using a Product Key found in Internet calling to Microsoft in USA and activating by phone. Everything went fine. Now I want to install the same Windows but x86 edition, not x64 as in my case on my dad's laptop. We downloaded Windows 7 RTM Retail MSDN version x86, and installed it. Tried using the same keys I used for activation of my version, but it says that they are blocked by Microsoft. I searched for other keys on the Internet, but they are either blocked or incompatible with this version... I tried calling MS to activate those blocked keys by phone, but automated system says that it is unable to process the activation. Recommends to return the product to reseller., etc. Though I tried to change product Key on my PC and one of those keys activated my Windows over Internet (probably the same key I used during the installation). How com can't I use it for another installation? What if I uninstalled it from my PC and decided to install it on a laptop? Anyway - the question is - am I missing something here? Should I install OEM version on laptops only? Maybe there are some unique ways of activating it on laptops? Please don't recommend me using Activators. I'm interested in activation by phone. Thanks.