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Force Windows 7 To Install No Matter What Kind of Key You Have

(Image used under: Creative Commons 2.0 [SRC])

If you lose or break your original installation CD for Windows 7, you're going to have a tough time. Maybe your neighbor has a copy, but it's the home edition and you have the pro. What can you do? Right now, a Windows 7 installation key is specific to the type of disk. However, all is not lost thanks to the Ei.cfg removal utility.

Although your Windows installation disc may say "Home Premium Edition," it still contains the other versions (such as Pro or Ultimate) on the disc—it just has a very small file called ei.cfg that tells the disc what version to install. The ei.cfg Removal Utility creates a new ISO of your install disc that ignores this file, thus letting you choose what edition you want when you start the installer.

It won't let you upgrade for free since your key will still have to match the version installed, but at least if you and your neighbor have a matching bit version (32 or 64) of Windows 7, you can use their disk for your reinstallation regardless of which package they purchased. Also, for people who routinely help friends with their computers, having a generic disk that can install any version of Windows easily is a huge help and cost savings.

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