Yes, Windows 7 keeps a track of every single device that you connect on your PC. How to know if this is true? Simple, go to HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Enum/USBSTOR. In there you’ll see something like this:
In that moment when we start using USBOblivion: this is a free software that will clear all usb drives history from your PC. This won’t cause any damage to your PC nor delete the drivers of the devices. It will only make them disappear from history, like they were never connected.
The best part of this software is that, like CCleaner, it has a “simulation mode” that shows which files will be deleted, and the possibility of make a backup file, making the process quite safe and easy. It works on any Windows, 32 and 64 bits, and is portable.
Link | USBOblivion