avrdude: ser_open(): can't open device "\\.\COM1": The system cannot find the fi

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i got arduino uno board , downloaded ide.  taking class , first thing instructed plug board usb post of computer , upload , run "blink" program suppose cause , led near pin 13 blink.  first of plug board computer led begins blink without having unloaded "blink" program.  second when try upload "blink" program following error.  ideas going on or doing wrong?



arduino: 1.8.1 (windows 7), board: "arduino/genuino uno"

sketch uses 928 bytes (2%) of program storage space. maximum 32256 bytes.
global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes local variables. maximum 2048 bytes.
avrdude: ser_open(): can't open device "\\.\com1": system cannot find file specified.

quote from: mdunn on jan 13, 2017, 11:10 pm
first of plug board computer led begins blink without having unloaded "blink" program.
that's normal.
quote from: mdunn on jan 13, 2017, 11:10 pm
avrdude: ser_open(): can't open device "\\.\com1": system cannot find file specified.
you need select com port of uno tools > port menu. if board doesn't appear on menu or menu grayed out may need install driver uno.


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