Hello heavenly_157 !
Thank you for writing to us. The solution to this problem is little tedious; So go throgh with the steps I am suggesting before you perform them.
You can remove write protection from your usb flash drive using the below method:
1. Open start menu, in the search bar type regedit and press enter. This will open the registry editor.
2. Navigate to the following path:
If the registry key StorageDevicePolicies does not exist, you will need to create it manually.
3. Highlight StorageDevicePolicies, and then create a New DWORD (32-bit) Value named as WriteProtect.
4. Double click the key WriteProtect in the right window and set the value to 0 in the Value
Data Box and press OK button
5. Restart your computer and try copying files into your USB drives.
Sometimes this problem is caused by two Windows registry entries that have become corrupted. To fix the problem, you have to use Registry Editor to delete the corrupted registry entries.
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, follow the steps as in the KB Article:http://support.microsoft.com/kb/322756/
If the issue persists, check what happens in safe mode.
Here are the steps to boot the computer into safe mode:-
1. Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer.
Click the Start button; click the arrow next to the Shut Down button, and then click Restart.
2. Do one of the following:
•If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you'll need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.
•If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.
3. On the Advanced Boot Options screen, use the arrow keys to highlight the safe mode option you want, and then press Enter. For more information about options, see advanced startup options (including safe mode).
4. Log on to your computer with a user account that has administrator rights.
When your computer is in safe mode, you'll see the words Safe Mode in the corners of your monitor.
Refer this link for more information.
“Start your computer in safe mode”http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode
These steps can be followed on Windows Vista or Windows Seven only.
Hope this will help.