How to Find the Key Code to the Operating System on a Computer
All versions of the Microsoft Windows operating system require the entry of a 25-character product key during installation. The key is designed to prevent software piracy, allowing for the activation of only a single copy of Windows with a given key. If you have your Windows installation disc case, look to the yellow sticker on the back of the case to locate your product key. If you no longer have the case, download and run one of several free key-finding programs to view the value associated with your Windows installation.
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Instructions
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Using Magical Jelly Bean Keyfinder
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Open a Web browser and visit the Magical Jelly Bean Keyfinder website.
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Click "Download Latest Build" and save the ZIP file to your computer.
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Open the ZIP file by double-clicking its icon. Extract the folder contained in the ZIP file to your desktop.
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Open the folder you extracted and double-click the "keyfinder" icon. Click "Run" if prompted by Windows.
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Click the name of your Windows version on the left side of the window. The product key appears on the right side of the window.
Using Product Key Finder
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Open a Web browser and visit the Product Key Finder website.
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Click "Download" and save the program file to your desktop.
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Run the program by double-clicking its icon. Click "Run" if prompted by Windows. Your Windows product key appears on the first screen.
Using Win Keyfinder
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Open a Web browser and visit the Win Keyfinder website.
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Click "Download" and save the ZIP file to your computer.
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Open the ZIP file by double-clicking its icon. Extract the program contained in the ZIP file to your desktop.
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Run the program by double-clicking its icon. Click "Run" if prompted by Windows. Your Windows product key appears on the first screen.
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