It’s bloody hard work finding a registry cleaner that is free and actually works, but I finally seem to have nailed it:
Official ToniArts software pages: «EasyCleaner is a small program which searches Windows’ registry for entries that are pointing nowhere. EasyCleaner also lets you delete all kinds of unnecessary files like temps, backups etc. You can search for duplicate files and you can view some intresting info about your disk space usage! You are also able to manage startup programs, invalid shortcuts and add/remove software list. ToniArts may not be held accountable in any way if EasyCleaner affects your computer in a negative way. List of some features:»