I had a few USB thumb drives that had accumulated a lot of old data on them which I did not need anymore. I decided to format and re-label them all. That worked fine, but now whenever I plug in one of the thumb drives into the USB port on my PC, I get a "Driver could not be loaded" error and the drive letter never shows up on Windows Explorer. Was there a device driver on the thumb drive which got wiped out when I formatted the drive? Of so, how can I fix this? These were no-name USB drives. Don't know who made them or where to download drivers for them. Someone must make a generic driver that can be used, no? Thanks!