I've got a brand new Uno R3 board, my previous sketches uploads, but immediately crashes with the error below. I've even uploaded a blank sketch as a test and still get the same error.
My other UNO board does not do this, what am I missing here?
Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes. avrdude: verification error, first mismatch at byte 0x00af 0x81 != 0x91 avrdude: verification error; content mismatch avrdude: verification error; content mismatch