If you find any Universal Serial Bus controllers disabled, just make it enable. Sometimes it is blocked by the system administrator to prevent external USB or mass storage access. If you do not find anything wrong in the Windows registry, you need to check serial port section of the “Device Manager”. Method #2: Enable USB Ports from Device Manager if it is Disabled This will enable the pen drive access and make all the USB drives working correctly in your office, school/college.
In the right-pane of the USBTOR key, choose Start DWORD 32-bit value and change its value to 3 from 4. Navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR. 
Alternatively, go to Start -> Run and type ‘Regedit’ in the run box and press enter button. In the search box of Windows 10, type ‘Regedit’ and select the appropriate option from the search results.
Open registry editor of Windows computer. Now, let me describe each method so that anyone can enable USB port access to your PC. Block USB drives using third-party Windows software. Disable the USB port options from Device manager of Windows. Disable USB ports using the command prompt. Disable USB removable disks and USB flash drives by using Group and Policy editor. Change the registry values for USB mass storage devices and disable USB ports. You can enable the USB port access and make them working the external drive ports normally anytime by reverting the changes. Possible Methods of Restricting access to USB drivesĪnyone can disable USB ports by using any of the methods mentioned below. Sometimes from infected USB drive virus can spread to those computers which result in loss of sensitive data. So to prevent unauthorized access to those files, to protect copying of those files, a system administrator can block any USB drive support to such PC. The computers of those places may have secured/restricted and valuable contents. The reasons for blocking the USB port access is very much clear. Whenever you try to insert any USB flash drive to the USB port of those PCs, you will not get any response neither from the computer nor the USB drive. Accessing the USB drive or ports mainly on the computers of offices, workplaces, schools, colleges, labs, restricted areas are disabled by the system administrator.
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