You need to install the driver of the your Toshiba device. If you have the CD then install it otherwise you can search it on the internet.
Try updating bios driver, place on the net you can computer scan to make sure drivers are up to date
I have Toshiba computer made in 2004. My original hard drive was damaged and then new non Toshiba hard disk was changed. I use window professional.Since that time two of my USB drive is not working