Each time we connect a USB to a Windows computer are stored in the registry entries, as well as in other locations in the system. That is why sometimes when we access the Device Manager or Computer, we are not erased the letters assigned to the USB that we have previously connected.
USBOblivion is a program that is responsible for removing these entries to the registry and the file system and Windows units. The program does a scan of all registry entries and system select locations to find those entries, which can eliminate.
Like all the programs that change any value in the registry, USBOblivion makes a backup copy of the registry, if problems arise after removing leftover entries or USB memory keys that are connected in the past.
It is convenient to use the program in test mode (option: Do Real Clean) to first examine what will be cleared, but the program automatically recognizes and ignores units that do not correspond to a USB device, so you should not have too many problems with the accidental erasure in the registry.