What happen if you wanted to reinstall your Windows XP, but found that you have lost your product key? Well, you can either hack into the system registry to check out the product key (that is, if you have the expertise) or go online and search for a pirated key. Alternatively, you can use RockXP to retrieve your lost key.

RockXP is an application that scans your system and retrieves the product key for your Windows and passwords for other Microsoft applications. In the situation above where you have lost the key, but need it for a reinstallation, this is the best application for you.