Hey guys! I have a question about a message I found out about. When I clicked on Serial Monitor a message popped up saying, "Board at COM1 is not available." I'm using an Arduino Uno connected to a Toshiba Window 7 computer that has just updated to Window 10. Please help me, I really want my programming to work! Thanks!
Ps: I don't really understand really-hard-to-understand direction so please tell me in normal English, please. :D