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Solution: - When you update your Windows OS and your computer displays a device connected with the name of USB Composite Devices instead of a printer then for sure you have encounter Brother Printer Error 11.
It can happen with any computer or printer. The main cause behind the occurrence of this error is that there is some problem in the duplex unit.
But, this problem is quite possible to solve. All you have to do is to follow our guidance step by step to solve it.
Here are the few steps you need to follow in order to remove this error.
(Note: If you don’t have another computer than you can use the same computer by using its Network port and following the procedure explained above.)