XpKey Finder

XpKey Finder is a small and portable utility that can retrieve the lost or forgotten serial number of your Windows XP copy. It is very simple to use, as there aren't any configuration parameters available.
Since there is no setup pack involved, you can just drop the executable file anywhere on the hard disk and click it to run. As an alternative, it is possible to move XpKey Finder to a USB flash drive or similar storage unit, in order to run it on any workstation with minimum effort.
What's more, the Windows Registry does not get new entries, and leftover files are not kept on the hard disk after eliminating the program; a standard file deletion is suffice.
The interface of the tool is based on a single window with a "what you see is what you get" layout, where the Windows XP serial key is immediately shown at initialization. XpKey Finder does not provide buttons for copying the product serial to the Clipboard, printing it, or exporting it to a plain text document. However, you can select it and copy it via the global Copy function available through the context menu.
As we had expected, the program is very light on the system resources, running on a minimal amount of CPU and RAM. It has a good response time and works well, without causing the operating system to hang, crash or show error notifications. All in all, XpKey Finder serves its purpose.