How to Reveal Your Windows Product Key in All Current Versions of Windows

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Here’s a situation to be avoided—for one reason or the other you have to reinstall the Windows operating system but you discover that you don’t know the product key. To avoid this predicament, retrieve the key now, print it out and put it somewhere safe.

There are numerous programs that will retrieve the Windows product key but many will not work on 64-bit systems. Some favorites like Belarc Advisor and System Information for Windows are very useful for providing all sorts of information but are overkill if all you want is the Windows key.

NirSoft ProduKey

Produkey from Nirsoft is a portable utility that requires no installation and can be run from a USB key. It works in all current versions of Windows including Windows 8. It does have the restriction that it does not work for Microsoft volume licenses in Windows 7 and 8 or certain OEM keys. There are both 32- and 64-bit versions. It also provides the product key for Microsoft Office. The description and download are at this link. The download link is near the bottom of the page.

Windows Product Key Viewer

For a quick and portable little program that works in 32 and 64-bit versions of Windows XP, Vista, 7,  and 8, try Windows Product Key Viewer from RJL Software.   It works from a USB key and is only 509 KB. It is free but it does put up a little flash screen for a second or two when you close the application. It only does one thing but it’s quick and easy to use. It has an option to print the key or save it to a text file. Requires administrator privileges in Windows Vista/7/8.

Magical Jelly Bean Keyfinder

Another little portable program to consider is Magical Jelly Bean Keyfinder. This program has been around for years but it has been updated to handle Windows 8 and 64-bits. It's another application that puts up a splash screen when you close it. Added later: This is another utility that the developer is now apparently bundling with other programs. (See comment by Chi-stan below.) The download on the developer's site is labeled as an "installer". Since this keyfinder is a portable program, no installer is needed. Instead of downloading from the developer's site, look for the ZIP file at locations like MajorGeeks. Do not download the file labeled "installer".

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This tips section is maintained by Vic Laurie. Vic runs a Windows blog called The PC Informant and also operates a computer education website.

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Comments

I found the following on another forum. The post was dated 11/23/14.
"I do not often comment on Forums, but as I used this forum yesterday along with the above program to find my Windows 7 Product Key, I wanted to share my experiences in hopes of warning others. While the magicaljellybean keyfinder program did find my product immediately on install without me having to do anything. However, with the download also came a very unwanted program called TuneUp Utilities, which may be an AVG product, but I'm not sure. There was no notice on the website that the TuneUp program was also part of the download. This program would not uninstall and I couldn't stop it process from running. More worrying was that it messed with my Norton AntiVirus program and I was really scared that in solving one problem, I let a monster out of the bag. I eventually had to resort to editing the registry, something I do NOT like to do, but after hundreds of deletes I got most of it. Please be careful!"
Source: http://www.tomshardware.com/answers/id-1819949/find-windows-product-key....

Thanks for telling us about this. It is becoming all too common for developers to bundle utilities with unwanted stuff. A note has been added to the article.

Here's a very simple way to find your Windows key. Download Belarc Advisor, a free system analysis app that's been around forever. Once it loads look to the upper left corner of the GUI where the words "Software Licenses" are highlighted. When you click on that link you will immediately see your Windows key displayed along with some other keys to software you may have on your computer.

Nirsoft has nice freebie for this with no flash screen. ( ProduKey v1.54 )
http://www.nirsoft.net/utils/product_cd_key_viewer.html

I am adding ProduKey. Thanks.