Has the ability (and option) built-in to scan various areas of the Windows registry to gather the information. The second solution is., also a portable app, serves the same purpose as License Crawler, with the exception it scans your PC for the license keys for Microsoft based products (such as Microsoft Office and Windows). The third solution is an application called. This app, also available in a portable version, is actually a tool that gathers detailed information about your system properties and settings and displays the results in a comprehensible manner.
One of the categories which it gathers information, is a category for license keys. The whole point to this article is to make you aware that if your PC goes south, you will need those product keys and licenses to reinstall your software. If you currently have your license keys keep them in a safe place for future reference and to prevent the keys from being stolen.
If you do not have the keys, take the time to try these apps to recover what you have paid for.