Windows 7 installation on a build

Can i only use the OEM cd version for a custom build? or can i use the cd that says upgrade? what's the difference?
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  1. You can use the upgrade if you already own a qualifying copy of Windows. The upgrade would normally assume that you had an OS installed on the computer and you were upgrading it to Win7, but also Win7 would only actually upgrade Vista and not XP so even if you had XP and bought the Win7 upgrade, you had to do a clean install of Win7. With Vista you could upgrade or do a clean install. At some point in the installation it probably asks you to put in the disk from your older version of Windows so it knows you do have it, then it continues with the clean install.

    I have read that there are ways to do a clean install of Win7 without having to dig out your older Windows disk, but you're on your own to search the net for that. If you buy an upgrade version of Windows and don't own a legitimate copy of Windows to upgrade, then you are violating the user license.
  2. You can use a Win7 OEM to do a clean install on any system, new build or old... (ah, but your supposed to be building a new system for it...)

    As cadder writes, there is also a Win7 upgrade version. With that you can only upgrade Vista. XP doesn't qualify for an upgrade, so you'll need to a clean install.

    Things I recommend:

    - if your hard drive is over 3 years old, buy a new one for a clean install (HDs don't live for ever, save the pain of loosing data or at least having to do it over again..)

    - DON'T input the OS KEY when asked. It'll run for 30 days just fine without it. This allows you to be sure everything is working fine with Win7 Before you lock down your key

    - check your motherboard and CPU to be sure they support 64 bit version of Win7 (which of course you should buy if possible, for full support of RAM about 3Gb.... )
  3. thanks!
  4. Are you a Student, or know one? $65 for Win 7 Professional

    You should also search for other offers.

    BTW: I got a Student upgrade for my XP machine. I followed my own advice & bought a new drive. You CAN install the Win 7 Professional UPGRADE version on the new drive, it just won't let you use the UPGRADE PRODUCT KEY to register it....

    SOOOO, I called Microsoft support, explained the situation & how much of a waste of time it would be for me to install XP on the new hard disk just to blow it away again. And, they logged into my machine and registered it for me !!!!
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