OK, I was just idly browsing along (trying to fix a Windows Installer problem), and I found this article…
… describing why the utility is NOT to be used for “cleaning up” your PC. It’s 110% correct – I’ve seen too many idiotic, uninformed bloggers posting “cleanup guides” with absolutely destructive advice (like disabling themes, services, etc). This is one of the more rare ones but I want to throw this out there in case there are some think-they’re-geeks out there that use the Installer Cleanup Utility as a “cleanup” tool.
The only thing this utility does to “clean” is to clean in the “what was dirty” sense, to gut a program’s configuration from Windows Installer, not from your computer! It just makes Windows Installer “forget” that a program was ever installed, so that installation issues can be resolved to re-install and cleanly uninstall the related program. It does NOT “clean” your computer of the installed program – hell, it doesn’t even uninstall it in the formal sense. All its files will still remain.
Personally, I use its “msizip G” as part of a cleanup routine, which removes orphaned Installer files – product packages that are located in the WindowsInstaller folder, but not associated with any product that’s installed. Usually from failed Office updates or the like.
Just a public service blog post. =P