Not in Sync error on nano that worked fine before

it has been few months (4) since playing nano.

i changed computers , updated 1.6? new 1.8.1

the upload error below.

here code using, tried pare down minimum wont upload...

what doing wrong, want upload , sync errors.

code

void setup() {
  // put setup code here, run once:
  // blink nano led light pin 13
  pinmode(13, output);
 
}

void loop() {
  // put main code here, run repeatedly:
 
}


error


arduino: 1.8.1 (windows 10), board: "arduino nano, atmega328"

sketch uses 558 bytes (1%) of program storage space. maximum 30720 bytes.
global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes local variables. maximum 2048 bytes.
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xb3
avrdude: stk500_recv(): programmer not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xb3
problem uploading board.  see http://www.arduino.cc/en/guide/troubleshooting#upload suggestions.

this report have more information with
"show verbose output during compilation"
option enabled in file -> preferences.

hi,
i had same problem , traced down 3d printer on , being plugged usb port. turned off 3d printer , upload arduino worked.

try unplugging usb ports.

i hope helps.

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