Tbyte32 :
I bought a Toshiba laptop with a pre-installed OEM version of Windows 7 Home Premium. Of course I created my back up disks but really dislike all the extra programs that they put on it. I used a program that pulls the CD-Key and was wondering if I could get another OEM version of Windows 7 Home Premium disk if I could install just a fresh copy of Windows 7 without all the extra crap that comes preinstalled and then use the key that I pulled from my preinstalled version. There is absolutely no change in hardware.
BEWARE!!!
I actually did exactly what you described, and now I get 0xC004E003 error code when trying to validate.
Apparently (source: http://social.microsoft.com/Forums/en-IE/genuinewindows7/thread/3d9c5a6c-812b-4a7d-8b67-209b4d974e34)
Just a little background so you can better understand the issue at play here.
When a computer comes with Windows Pre-installed on a computer from a Large Manufacturer (Dell, HP , so on) they use a specal kind of Product Key. The key is called a OEM SLP key. When the key was entered into Windows (at the factory) Windows see the specal key and then looks at the Bios of that computer for a OEM Bios Flag. If the proper Flag is present, Windows will Self-Activate (I.e. it activates without connecting to Microsoft's Activation servers)
Now, each OEM SLP key and OEM Bios Flag combination is Manufacturer and Windows version specific. This means each Manufacturer has it's own sets of OEM SLP/Bios Flags and each OEM SLP/Bios Flag pair is only good for one type of Windows.
What this means is that your Dell computer originally came with Vista, so, from the factory, it had the Dell OEM SLP/Bios Flag for Vista.
Later you installed the Dell copy of Windows 7 which contained the Dell OEM SLP key for Windows 7 Professional. However, the computer still has the OEM Bios Flag for Vista. The OEM SLP key and OEM Bios Flag do not match so Windows fails to self-activate.
At this point, for your Windows 7 to work, one of two things needs to happen.
• You get a Bios your model of PC that includes the Dell OEM Bios Flag for Windows 7 Professional, so that Windows can match up the OEM SLP Key with the proper OEM Bios Flag that enables it to Self-Activate. The only place to obtain this Bios would be thru Dell. or
• You can change out the OEM SLP key with the Windows 7 Professional COA SLP key from the Certificate of Authenticity that came with the Windows 7 upgrade disk, from Dell. A COA SLP key is Always included with an OEM SLP key. This is a backup key just in case the OEM SLP/Bios Flag connection fails for some reason. You just us the Chage Product key function in Windows 7 to enter in the COA SLP key. The COA SLP key must be Activated manually using the Activate by Phone method. (Note: If Dell did not include a Certificate of Authenticity with the Windows 7 upgrade disk, then you do not have a Licensed copy of Windows 7 and would need to contact Dell for the Certificate of Authenticity.)