When it is determined that the end user has an eligible Windows license, the customer service representative will provide a single-use activation code to activate the software. Call the number and explain the circumstances. In this case, the appropriate local Activation Support phone number will be displayed. If the software was previously activated, you will not be able to activate it online.
Insert Windows XP Professional or Tablet PC Edition media in the CD drive and follow the installation instructions. Additionally an end user, who is licensed separately through Microsoft Volume Licensing (VL) programs, may provide their VL media and key to their system builder to use to facilitate the downgrade on only their systems. The media should come from a prior legally licensed version from the OEM or Retail channels. Obtain genuine Windows XP Professional or Tablet PC Edition and a corresponding product key. Perform the downgrade or authorize an Original Equipment Manufacturer (OEM) to perform it.įollow these steps to downgrade to a previous version of Windows:. 
Accept the Windows 7 Software License Terms. Purchase a PC preinstalled with Windows 7. Then, use the same program to edit the ISO and delete ei.cfg from the Sources folder and save your changes. Use a program like IsoBuster or other ISO editing tool to create and ISO image of your physical install DVD. The second option is more time consuming and requires third-party tools. More details can be found on my How to install Windows 7 from a USB Flash Drive article. Then just boot to the USB flash drive instead of the original install DVD. Finally, copy all files and folders in D:\win7install\ to a 4GB USB flash drive formatted with FAT32. Then navigate to the Sources folder and delete ei.cfg. You have two choices:Ĭopy the entire contents of a Windows 7 install DVD to a folder on your computer such as D:\win7install\. The key is deleting the ei.cfg file from the install DVD. If the file is deleted a new menu appears that allows you to select any edition of Windows 7 to install. If this file exists, the setup program reads the file to identify what edition of Windows 7 to install. The secret is the ei.cfg file located in the Sources directory on the installation DVD. The same is true for 64-bit installation media. If you have a 32-bit Windows 7 install DVD you can install any 32-bit edition from it. This works on all editions of Windows 7 including Starter, Home Basic, Home Premium, Professional, Enterprise and Ultimate. 
Do you have a license for Windows 7 Ultimate but only have the Windows 7 Home Premium install media? Do you want to try a different edition of Windows 7 for 30 days without having to buy it first? With a simple trick you can enable a hidden menu that allow you to install any edition of Windows 7 from any Windows 7 installation media.
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