Just about this morning I receive a mail asking if he can delete the config.msi folder and if it’s safe to remove config.msi folder. The answer is yes, you can safely remove config.msi folder. But before we begin the procedure on deleting that folder let me first explain what is config.msi and where you can find it.

Config.msi is a hidden folder that is located on the root drive of Windows. During an installation it saves files with the extensions of .RBS and RBF. What is .RBS and RBF.? well.. they are rollback script files used by the installer to uninstall recent changes if an install fails somewhere along the way. These two files can reside on different drives. The .rbs files are always stored in Config.msi folder on the drive where the operating system is installed. The .rbf files are stored in the Config.msi folder located on the disk where the program that is being backed up currently resides.