How can I disable write protection in my USB flash drive?
Have you tried in linux version like Ubuntu/Fedora?
I had experienced this problem some years back and I plugged that USB flash drive in one of my linux live CD and formatted the drive and it worked well.
Here is the solution to remove write protection in pen drive. please do the following steps
Start -> Run -> Regedit -> HKEY_LOCAL_MACHINE\SYSTEM\Currentcontrolset\control\storagedevicepolicies
Edit the modify the binary data set value '0'
After editing, complete the GPupdate in cmd.exe.