Windows Product Key Finder
Windows Product Key Finder is a lightweight and portable application whose goal is to retrieve the lost or forgotten serial number to your Windows edition. It is very simple to use, as it doesn't include any settings.
Since installation is not a requirement, you can drop the executable file anywhere on the hard disk and click it to run.
It is also possible to save Windows Product Key Finder to a USB flash drive or similar device, in order to run it on any machine with minimum effort.
What's more, the Windows Registry section does not get new entries, and files are not kept on the hard disk after removing the tool.
The interface is based on a simple window with a plain layout, where you can check out the Windows version, CSD version, serial, install date, registered user and organization. To find out the product key you simply have to click a button.
Unfortunately, Find Key does not provide an option for exporting the key to an external file, but you can copy it to the Clipboard via the right-click menu, after making a selection.
The simple-to-use utility is very light on the system resources, using a minimal amount of CPU and RAM. It has a good response time and doesn't cause the OS to hang, crash or pop up error dialogs. We haven't come across any issues in our tests. All in all, Find Key serves its purpose.