Unable to safely remove my passport ultra's from all computers even though all programs are closed

Since buying a number of new my passport ultra’s I have been unable to safely remove them from not just my computers and laptops but all computers. The message says it’s still in use and cannot be safely removed even though I’ve closed all programs. I usually get around this on my laptop by closing the lid and waiting for it to wind down. But I can’t keep turning off desktops. If I just remove it, I later need to go through the drama of scanning and repairing next time I plug it back in. Any ideas.
Thanks, Jaycee


Please refer to the following KBA article:Setting up and using WD Security and WD Drive Utilities