This is in Reply to Comfy (2)'s Post and Kiran Kishore's Post....
The Driver Update Tool – is a utility that contains more than 27 million official drivers for all hardware, including mass storage device usb device driver. Hi, Thanks for your reply. I checked my BIOS and going by the ASUS website I already have the latest version installed (3603 for Win7 & Win8) Thanks. When I upgraded to Windows 10 a message came up instructing me to uninstall the 'Renesas Electronics USB 3.0 Host Controller Driver' because it was incompatible. Windows 10 startup proceeds, but a message box is displayed informing you that the USBSTOR service has failed to start. Restore Default Startup Type for USB Mass Storage Driver Automated Restore. The Driver Update Tool – is a utility that contains more than 27 million official drivers for all hardware, including mass storage controller driver.
I am having the same problem as Comfy (2) is having. My Western Digital 2TB drive had previously come up in My Computer and I was able to play video files off of it and everything, when my computer rebooted, is still is in my device manager and says its working ok but it is not showing up in My Computer any longer nor can I see its files. I have run the Troubleshooting Windows Software mentioned above and it says its working fine. Although I did notice that it is using Windows drivers, could that be a problem? Should it have its own driver from WD? I also can't update the driver as I am guessing its the latest one from Windows. I have tried everything that Comfy (2) has done. This computer is literally brand new a few days ago and is Window 10 x64 and the only other thing I can think of is that I think it is USB 1 or 2 the device but I have USB 2 and 3 USB Ports. Oh, and I don't get any error codes either, as its supposedly working.
Windows 10 startup proceeds, but a message box is displayed informing you that the USBSTOR service has failed to start. Restore Default Startup Type for USB Mass Storage Driver.
I would greatly appreciate any support & Thank You in advance for your Time and Effort! Christine
Mass Storage Driver Toshiba
Edit: I found out the problem through Disk Management, it is Offline: This drive is offline due to a 'Signature Collision', one or more drives has the same signature. In this can be corrected as Western Digital has this error and reply on how to fix it but not for Windows 10 only for Windows 8 & 7. I have a support ticket into them. Unlike Windows, it is very hard to find anything on their support site, basically when you put in a question even if its worded correctly the only answer that has any relevance is at the bottom of the page. I only mention that for anyone else looking that will go looking for this answer themselves. If you you have a Western Digital drive, download or start their Utilities Software and on the Diagnose Tab and the First Test says its good and the next two tests seem like they don't even run past the first green bar then fails it, go into your Disk Management, if there is a little yellow ! on it hover over it and it will tell you whats wrong with it. Hope this helps anyone looking for answers they can't seem to find when their drive is ok but, you can't see it in My Computer or see its files. Christine