TUTORIAL: Windows Not Detecting Any USB drive - Solution

This problem occurs when no device is connected to a USB port. That makes the USB driver set the Open Host Controller Interface (OHCI) controller to a suspended state. When the OHCI controller is in a suspended state, it cannot always detect when you add a new USB device to your computer. 


SOLUTION:- 
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* Click Start Menu -> Go to RUN 


* Type REGEDIT 
Registry Editor will open. 


* Locate to [HKEY_LOCAL_MACHINE->SYSTEM ->ControlSet001 -> Services ->USBstor] 


* Find "Start" in the right panel 


* Double click "Start". A box titled "Edit DWORD value" will open. 


* Write down "3" in the "Value Data" Field. 


* Click OK and then close the Registry Editor. 


Your USB flash drive is now Enabled. You can Disable it also By Putting The value as "4" 


Note:- 
This Tutorial will only Enable/Disable USB Mass Storage devices and will not affect other USB Devices such as USB Keyboard, USB Mouse, Scanner, Printer etc