I am using the nordic nrf51822 Evaluation Kit and everytime I try to load the blinky project to the board an error message comes up saying no cortex-m sw device found. Device manager in window shows the board is being recognised by windows so I don't know why the board cannot be found by keil uVision?
Instead of focusing on Device Manager you want to be looking at the Debug and Utilities tabs of the project options in Keil, confirm you've picked the right debugger hardware, right mode (JTAG/SWD), and that it finds the debugger, and device(s) connected to the debugger.