Windows Repair Kit is a system optimizer suite with a set of tools to clean the Windows registry and prevent common problems that may cause instability in your system. WRK deals with errors brought by installing/uninstalling software very often, which cause wrong entries in the registry, wrong settings, broken paths, invalid shortcuts, etc., and often slow down the system.
The program scans your computer for all these errors and shows you a report with all the problems detected together with their 'threat level', and allows you to decide which ones to fix. The kit also includes an Internet Optimizer, a StartUp Manager to stop programs that boot with Windows, and a scheduler to perform automatic scans.
Windows Repair Kit is easy to install and use, however it deals only with basic problems, being a limited solution compared with TuneUp Utilities or CCleaner. Besides, the trial version only detects errors and repairs a small percentage of them. To perform a complete clean up you need to register the program. But before that, be sure to check for other alternatives here on Software Informer; chances are that you find more interesting options, and for free.