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How to remove write protection from USB/Flash drive or Mp3 Player:
Six days ago,
My Kingston USB Flash Drive got Write Protected,
And I couldnt write files to it,
nor could I delete any files, nor could I format my USB drive.
I spent hours and hours searching on google for a solution, then on a forum, I finnally found a guide that worked for me 
(Hurray !)
Well, this guide includes edits in windows registry, but its very easy.
Here is the guide :
Now take a backup of your registry, incase something goes wrong:
Right Click on ‘My Computer’ -> ‘Export’ > save it on the Desktop.
Now Browse through these tabs:
My Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies
Double click on the string ‘WriteProtect’ and change the ‘Value Data’ box to ‘0’
On Toolbar, Click on File -> Export -> Save it anywhere with any name like ‘WriteProtection01.reg’ or anything.
You need to repeat the step 3 – step 5 with every string on folder named ‘ControlSet***’ (* = any Digit, i.e. 001, 002) – that is, instead of currentcontrolset, repeat the steps for folders controlset***
For Example :
My Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\StorageDevicePolicies
– Again export it on same directory as before, named as ‘WriteProtection0**.reg’
Note : These exports are just incase you need to revert the changes in your registry, to revert, just double click on the *.reg file, and click yes when it prompts.
