if you are trying to get to DFU to do a restore (this will delete all your data on the phone, not icloud)
1.connect to phone to the pc and open itunes
2.hold Power + Home button for 10 seconds
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3.Release Power button but keep holding Home button for 5 seconds or until you hear the pc sound when you connect a device
+
3.Release Power button but keep holding Home button for 5 seconds or until you hear the pc sound when you connect a device ( if you see the apple logo, you holded home + power too long, repeat step 2)
at this point itunes should detect the phone in DFU and should let you do a restore, this will trigger icloud protection if there is any, make sure you know your password to the icloud account or you wont be able to access your phone.
if you are trying to get to DFU to do a restore (this will delete all your data on the phone, not icloud)
1.connect to phone to the pc and open itunes
2.hold Power + Home button for 10 seconds
3.Release Power button but keep holding Home button for 5 seconds or until you hear the pc sound when you connect a device
at this point itunes should detect the phone in DFU and should let you do a restore, this will trigger icloud protection if there is any, make sure you know your password to the icloud account or you wont be able to access your phone.
Good luck!