How can I find the product keys for my Windows operating system and software installed, like Office, Adobe Creative Suite, and other software which requires an activation key?
Keyfinder Thing is an easy to use, fully featured free key finder program.
- Simple user interface
- Extremely small download size
- Instant display of several product keys
- Ability to export found keys for backup purposes
- Ability to scan entire registry for serial numbers
- Slower to load than competition
LicenseCrawler is a free key finder program. It is simple to use but very impressive with the variety of serial numbers and product keys it finds.
- No installation necessary
- Very easy interface
- Quickly scans the registry for serial numbers and product keys
- Results are cluttered with registry details and other non-product key information
Product Key Finder is an extremely simple but very functional free key finder.
- No installation or unzipping required
- Easiest interface of any key finder I've ever tested
- Instant display of most popular product keys and serial numbers
- Well formatted display of keys
- Lack of any advanced options whatsoever
Product Key Finder is a free tool that will display the installed Windows Product Key and other important Windows system information. Product Key Finder works with the following Windows operating systems (2000, 2003, XP, Vista, 2008, 7), 32-bit and 64-bit. You will be able to save all product keys to a text or an xml file.
There is Belarc Advisor, free for personal use. It scans your computer for several minutes and finds all the product keys stored on the PC, including the Windows OS product key.
The Belarc Advisor builds a detailed profile of your installed software and hardware, missing Microsoft hotfixes, anti-virus status, CIS (Center for Internet Security) benchmarks, and displays the results in your Web browser. All of your PC profile information is kept private on your PC and is not sent to any web server.
Note: I am not in any way affiliated with this product; have used in the past to extract my OS product key, as well as my Office key.
There's the Magical Jelly Bean Keyfinder, though unfortunately it appears to have been superceded by a "paid for" version.