I recently purchased an Acer Veriton (VM2630G). However, for my application, I wanted 2 hard drives in a RAID array. Before changing the system, I checked the Product ID & Windows 7 Pro CD Key, so I had them for reference. I then added a PCI-e RAID card and a second hard drive and reinstalled Windows 7 Pro onto the new RAID drive from a friends OEM install disc. I used the factory installed CD Key during the Windows setup, but now when I try to activate it, the activation fails. Upon calling Microsoft, they tell me that Acer has blocked this CD Key from being activated. Why can't I activate my brand new computer with the OEM CD Key on an OEM software install?