Problem uploading to board

Arduino: 1.8.5 (Windows Store 1.8.10.0) (Windows 10), Board: "Arduino/Genuino Uno"

C:\Users\Luke\Desktop\tscu\tscu.ino: In function 'void setup()':

C:\Users\Luke\Desktop\tscu\tscu.ino:83:12: warning: return-statement with a value, in function returning 'void' [-fpermissive]

return 0;

^

C:\Users\Luke\Desktop\tscu\tscu.ino:93:12: warning: return-statement with a value, in function returning 'void' [-fpermissive]

return 0;

^

C:\Users\Luke\Desktop\tscu\tscu.ino:103:12: warning: return-statement with a value, in function returning 'void' [-fpermissive]

return 0;

^

C:\Users\Luke\Desktop\tscu\tscu.ino:113:12: warning: return-statement with a value, in function returning 'void' [-fpermissive]

return 0;

^

Sketch uses 2520 bytes (7%) of program storage space. Maximum is 32256 bytes. Global variables use 165 bytes (8%) of dynamic memory, leaving 1883 bytes for local variables. Maximum is 2048 bytes. avrdude: ser_open(): can't open device "\.\COM1": The system cannot find the file specified.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

Hi can someone help D: Thanks!

(deleted)