You can turn any sketchy PC into a private one with a single USB

If you have to borrow a computer at your hotel or use one at the library, you have no idea what that machine is loaded with. You might assume that using private browsing or quickly deleting your files will protect your privacy, but sadly, that may not be enough. If the computer has trackers installed, cached logins, or malware, forensic traces of your activity may still be recoverable from the storage drive even after clearing your history.