My Win 7 Ultimate PC doesn't connect pendrives anymore. I clicked on devmgmt.msc and checked it out, and it simply shows USB Mass Storage Device with a yellow '!' beside it. Tried 'update Driver software', still no progress. Any advice?
Uninstall the driver and restart your PC. All uninstalled drivers will be automatically re-installed. If the problem still persists, change the hardware.
1. Try on other pc to confirm the pendrive still working. 2. Try other pendrive to confirm usb still working.
If you used that pendrive to make a booteable drive, try using a partition manager software and "create a partition table" on that drive, then create a partition with full size. Windows is stupid on anything related to filesystems.