Install Sony USB Mass Storage Device driver for Windows 7 x64, or download DriverPack Solution software for automatic driver installation and update.

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When you uninstalled all USB mass storage drivers, did you also uninstall the 'Hidden' drivers? Leave the bad usb flash drive and any other devices disconnected except the mouse and keyboard. Go to the Device Manager and go to View and choose Show hidden devices. Right click on and uninstall all the greyed out USB drivers under Universal Serial. I’m trying to choose a USB thumbdrive to use on my instrument. In the user manual of my instrument, there is one specification stated as below: “Mass storage devices that are compliant with USB Mass Storage Class Ver. 1.1” This is why I trying to ask which USB Flash Drive SanDisk have comply to the above statement. Thank you for your advise. The usb drivers are generic drivers Please go to the device manager on your PC and uninstall all USB MASS STORAGE DRIVERS restart your laptop PC from the OS the drivers should reinstall by itself. 4 Find your USB Flash Disk Mass Storage Controller device in the list and press double click on the usb device. Click Reinstall driver button. 5 Choose Install from the specific location and click on the Browse button. Click on the Next and Finish button after that to complete the installation process. 6 After these steps, you should see USB.

[SIZE=5]How to Repair Corrupt USB Mass Storage or CD/DVD Drivers
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[SIZE=4]For some unknown reason, I've been seeing cases where USB Mass Storage or CD/DVD driver files go missing. This corrupts the respective driver.[/SIZE]

• [SIZE=4]USB Mass Storage Driver - used for external USB storage devices like flash drives, hard disks, and USB CD/DVD drives.[/SIZE]
• [SIZE=4]CD/DVD Driver - used for CD/DVD players. If you have a USB CD/DVD note that Windows installs the USB Mass Storage driver first. Only after the Mass Storage driver is installed and working correctly, Windows installs the CD/DVD driver. If it's an internal CD/DVD drive Windows only installs the CD/DVD driver for it[/SIZE]

[SIZE=4]When driver files are missing, the driver is corrupt and can't be installed. Device Manager will have an entry with a yellow icon - indicating a device error. The device may be listed under 'Other Devices' or other places in Device Manager.
Right click the device ->Properties->General tab. If error is because no driver could be found, you'll see device status code= 28
The following instructions apply to Windows Vista and higher. [/SIZE]

[SIZE=5]USB Mass Storage Driver[/SIZE]
[SIZE=4]These 3 files should exist (or the driver is corrupt)[/SIZE]

• [SIZE=4]C:Windowsinfusbstor.inf[/SIZE]
• [SIZE=4]C:Windowsinfusbstor.pnf[/SIZE]
• [SIZE=4]C:Windowssystem32driversusbstor.sys[/SIZE]

If one or more of these files are missing

1. Navigate to C:WindowsSystem32DriverStoreFileRepository
2. Scroll down. Find the folder name that starts with usbstor.inf_
3. You may see more then one folder with name starting usbstor.inf_. IF YOU DO: you want the folder with the most recent date
4. Open the folder. There's a copy of the 3 files you need. Copy each one to its correct location as shown above
5. Jump to the instructions below to delete the INFCACHE.1 file

[SIZE=5]CD/DVD Driver[/SIZE]
[SIZE=4]These 3 files should exist (or the driver is corrupt)[/SIZE]

• [SIZE=4]C:Windowsinfcdrom.inf[/SIZE]
• [SIZE=4]C:Windowsinfcdrom.pnf[/SIZE]
• [SIZE=4]C:Windowssystem32driverscdrom.sys[/SIZE]

If one or more of these files are missing

Flashdisk Usb Mass Storage Controller Driver Combo

1. [SIZE=4]Navigate to C:WindowsSystem32DriverStoreFileRepository[/SIZE]
2. [SIZE=4]Scroll down. Find the folder name that starts with cdrom.inf_[/SIZE]
3. [SIZE=4]You may see more then one folder with name starting cdrom.inf_. IF YOU DO: you want the folder with the most recent date[/SIZE]
4. [SIZE=4]Open the folder. There's a copy of the 3 files you need. Copy each one to its correct location as shown above[/SIZE]
5. [SIZE=4]Jump to the instructions below to delete the INFCACHE.1 file[/SIZE]

[SIZE=5]Delete the INFCACHE.1 file[/SIZE]

1. See Add 'Take Ownership' to Explorer Right-Click Menu in Win 7, 8 or Vista. (I recommend the easiest way to do this: use the Take Ownership.zip file they provide to update the registry for you)
2. Navigate to C:WindowsSystem32DriverStore
3. Right click INFCACHE.1 Select 'Take Ownership' in the context menu
4. Delete INFCACHE.1. Reboot your computer

Windows will rebuild the INFCACHE.1 file and (hopefully <fingers crossed>) be able to find and install the device driver for you!

Accessing the USB drive or ports mainly on the computers of offices, workplaces, schools, colleges, labs, restricted areas are disabled by the system administrator. You may have noticed this. 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. The reasons for blocking the USB port access is very much clear. The computers of those places may have secured/restricted and valuable contents. 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. Sometimes from infected USB drive virus can spread to those computers which result in loss of sensitive data. These are the main reasons.

Possible Methods of Restricting access to USB drives

Anyone can disable USB ports by using any of the methods mentioned below. You can enable the USB port access and make them working the external drive ports normally anytime by reverting the changes.

1. Change the registry values for USB mass storage devices and disable USB ports.
2. Disable USB removable disks and USB flash drives by using Group and Policy editor.
3. Disable USB ports using the command prompt.
4. Disable the USB port options from Device manager of Windows.
5. Uninstall the USB mass storage driver.
6. Block USB drives using third-party Windows software.

Now, let me describe each method so that anyone can enable USB port access to your PC.

Also useful:Protect USB drives from spreading Virus infection

Method #1: Enable USB when System Admin Prevents Using of USB Drives and Mass Storage Devices Using Windows Registry

In order to enable/disable mass storage or USB drives, you need to be an administrator account holder of Windows 10/8/7 PC. Because RegEdit always requires admin privilege to run.

1. Open registry editor of Windows computer. In the search box of Windows 10, type ‘Regedit’ and select the appropriate option from the search results. Alternatively, go to Start -> Run and type ‘Regedit’ in the run box and press enter button.
2. Navigate to the following registry key:
3. In the right-pane of the USBTOR key, choose Start DWORD 32-bit value and change its value to 3 from 4. This will enable the pen drive access and make all the USB drives working correctly in your office, school/college.

Method #2: Enable USB Ports from Device Manager if it is Disabled

If you do not find anything wrong in the Windows registry, you need to check serial port section of the “Device Manager”. Sometimes it is blocked by the system administrator to prevent external USB or mass storage access. If you find any Universal Serial Bus controllers disabled, just make it enable.

Method #3: Check the Windows Group & Policy editor and Enable USB port

Deny all access to removable storage using Windows Group and Policy editor is another way which is used by the system administrator. So, if you see that the external USB storage is not working on your Windows computer, and if have already tried the above-mentioned procedures, just check the Group & Policy editor carefully. If you do not have admin account access to your PC, then can’t make the desired changes to make the USB ports working on your PC.

1. Press Windows+R to open the Run dialogue box. Type gpedit.msc in the box and press enter.
2. Navigate to Computer Configuration -> Administrative Templates -> System -> Removable storage access.
3. Select All Removable Storage classes: Deny all access option.
4. Double click on it.
5. Make it disable if it is set to enable.
6. Thus you can get success to unblock USB access of a PC.

Method #4: Reinstall USB Mass Storage Driver on Your PC

The worst approach to restricting users from using external mass storage on a PC is by uninstalling USB mass storage drivers. When the authority tries to prevent data sharing or prevents something similar to a virus infection on a PC, USB port access can be blocked for the users by uninstalling USB mass storage drivers from the computer. The authority must block software installation on the PC.

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If you want to enable USB port in such PC, it is very difficult. Admin access is the first thing that you mainly need. Find the suitable USB driver for your PC. Install it. You may require administrative credentials to install USB drivers. After installing the drivers, the USB ports will start to functioning again.

Method #5: Disable Suspicious Tasks and Uninstall USB Port Blocker Software

In some computers, the system admins use USB drive disabler software (like Ratool or Intelliadmin) and thus they prevent users from connecting the USB device. To bypass USB restriction, you need to find and uninstall such software from PC. Also, open windows task manager and kill the task(s) and process(es) which you find suspicious. You can try Microsoft Fixit to fix to make the USB work like before.

Final Words:

Flashdisk Usb Mass Storage Controller Driver Windows 10

Most of the organizations (schools, colleges, offices, etc.) restrict users to connect USB ports to the PCs by disabling the ports (to secure important documents, files etc.). However, anyone can bypass the restriction by removing the cause that prevents you from using the USB ports. Here is the summary which helps you to enable USB mass storage device on a PC.

Change Windows registry setting and use USB port again.

Change Group & Policy editor setting to enable external pen drive/flash drive access.

Enable USB ports options from device manager.

Uninstall USB blocker software and enable USB access to any computer.

Hope this tutorial helps you to unblock USB ports which are blocked in office, school, and college.

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