Modify the batch file to START
both programs, instead of START
ing one and CALL
ing another
start C:\Users\Yiwei\Downloads\putty.exe -load "MathCS-labMachine1"
start "" "C:\Program Files (x86)\Xming\Xming.exe" :0 -clipboard -multiwindow
If you run it like this, no CMD window will stay open after starting the program.