I started this topic regarding an issue I had with CCleaner and OpenOffice 3.1. For some reason, I couldn't see OpenOffice 3.1 in cleaning options and program ignored cleaning OO3.1 files. After a little research. I reached to the conclusion stated here ie OpenOffice3.1 uses different registry keys when installed ONLY for certain user. The way it is now, CCleaner will 'see' OpenOffice 3.1 ONLY if the later is installed for all users. How easy it is to catch the possibility for single user installation?