I have the following problem with my usb a Kingston DataTraveler: the computer sees it but when I try to open it it says "Access denied". I know the memory stick was in an infected computer, so this situation is due to a virus. How can I delete the virus and be able to use the usb?
Right click on the memory stick icon in "My Computer" and select "Format" so you can wipe it and start over. Hope it will be helpful.