ust recently, my Acer Notebook's IDE 0 (Master) hard disk decided to fail on me after just 1 year and 8 months, and of course outside of the warranty period. So I replaced it not knowing of the aforementioned condition of the pre-installed EULA of this product which would BREAK my completely legal and fully purchased version of the pre-installed Operating System the very second I swapped the failing and the new functioning hard drives. Lo and behold, after the change of the hard drive model, serial number and capacity, my pre-installed Windows 7 Home Premium recovery disks (both a freshly ordered set and also a self-made image set) kept returning: "Windows Setup could not configure Windows on this computer's hardware" and kept restarting on the "Setup" screen and would go no further, no matter what I tried (on ALL six installation attempts). Curious, I perused the EULA to see if it could give me any information for why this was happening and discovered the reason for this to be the replacement of a faulty hard drive and because the pre-installed OEM version had remembered the original hardware configuration, and would not permit it's use just because of the new hard drive installation! And again, to remind you, on previous Windows versions, this was NEVER the case UNLESS the motherboard was changed!