The DELL Inspiron 17R SE 7720of of my mother was used since years and without problems with a wireless mouse and keyboard connected to.
But now, since I installed the drivers for a new "Brother DCP-L2500D" printer/scanner device, the wireless mouse and keyboard stopped working - more precisely: After a start/restart of Windows, the wireless mouse & keyboard are dysfunctional at the login screen. If then the printers USB connection is unplugged, the wireless mouse & keyboard are back operational after like 10 seconds.
I have tested all available USB ports and "permutated" the connections in all possible combinations - to no avail...
Any hint/idea how to fix this is highly welcome!
BTW: The laptops built-in keyboard and touch-pad are never affected and do work all the time.
The OS is Windows 7 Home Professional (64bit).
Thanks for your message.
Your suggestion makes sense, I have already submitted the issue to the Brother support team.