sandisk cruzer on Toshiba

I have a Toshiba Satellite L670 with Windows 7 64bit Home Premium.

Recently I’ve bought 3 usb sticks SanDisk Cruzer, 2x8Gb and 4GB. Have tried multiple USB ports on this computer, but same result. The computer recognizes the SanDisk Cruzers, as it makes the sound when the USB drive is plugged into the machine, but it doesn’t show up on File Manager or windows explorer of this machine, so cannot use the USB drive.

I have moved the USB sticks to another two Windows 7 machines (Home Premium version). The USB drive is immediately recognized by the other desktop and opens and is available in windows explorer, with no problems. I have found a temporary solution by desconecting my Toshiba from power cable and after reboot the sticks are recognized but only for 10-15 minutes.

I have others usb sticks that are working perfectly on my Toshiba, the problem is just with SanDisk sticks!
very awkward situation, please help!

very helpful forum

This help?

Thank you, but no, it doesn’t help.