Windows 10: How to remove write protection on usb

I wanted to install windows 8.1 on a windows 7 computer so I put the iso file on a usb drive and made it bootable but after I tried booting from it it said I had to change it to MBR since it was on GPT but I couldn’t because it said it was write protected. How do I fix this I tried using stuff like cmd and regedit to fix.

:)

 

How to format write protected usb pendrive?

How to format write protected usb pendrive?

tried all stesp from following list, but not sucessful.

Code: http://www.makeuseof.com/tag/how-to-fix-write-protection-errors-on-a-usb-stick/[/quote]

 

USB devices getting write protected

Hi Imdad,

Some removable storage devices like USB flash drives or pen drive have write protection which is designed to help users prevent unexpected data loss by refusing to delete or format.

However, if you’re stuck with a write-protected USB drive that can’t be formatted. We recommend that you follow these steps on how to erase and format a write-protected USB flash drive and pen drive using the Regedit.exe tool in Windows. To do this,
follow the steps below:

• In the Search box, type regedit and press Enter.
• Navigate to the following folder:
  
  Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies

Double-click on the WriteProtect value in the right-hand pane of Regedit.exe. Change the Value data from 1 to 0 and click OK to save the change. Close Regedit and restart your computer. Connect your USB flash drive or pen drive again, and you should find the
write protection is removed and the device is no longer write protected.

Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection,
back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, refer to the following Microsoft Knowledge Base article.

How to back up and restore the registry in Windows How to back up and restore the registry in Windows - Microsoft Support.

Let us know if you need further assistance.

 

How to Remove Write-Protection from an OEM USB Drive?

I did all that. After I entered, "ATTRIBUTES DISK CLEAR READONLY", I didnt get a prompt stating that the write protect has been removed. But the command prompt stated that disk attributes cleared successfully.

But when I tried to format the USB drive I get a pop up window stating that its still write-protected. Do you have any other suggestions?