In a similar vein, but back in time….when you installed those programs you now have removed….
Many programs use the msi format, which uses the Windows Installer. When those installations crash, or are halted midway, or anything bad happens, Windows Installer usually just exits, leaving behind a mess. Windows Installer Cleanup utility will clean it up for ya!
Amazingly….its made by microsoft ;)
Check it out: Windows Installer Cleanup Utility