Unable to upload to nano

Development Tools IDE 1.x
1

Hey guys. I have a recently purchased Arduino Nano, and am having trouble uploading to it. I am on a 64-bit, Windows 7 system. The correct board and processor are selected. The green LED lights up when I plug it in, and when I press the reset button, the L orange LED turns off for a moment and then blinks before resuming its usual pulsing at about 2 Hz.

When I upload, I get this message:

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x0d

It then tries nine more times, none of which work.

Things I've done:

  1. I've tried pressing the reset button at various points before and after uploading, which doesn't seem to help.
  2. I updated the FTDI drivers. No help.
  3. I updated the IDE from 1.0.6 to 1.6.3. No help.
  4. I attempted to try uploading from a different computer (Windows 8.1), but was unable to even get the computer to recognize a board was attached.
  5. I tried a different USB cable; didn't help.
  6. Some other stuff, but I don't remember what most if it was. Most of the things people recommended in the threads I found on this topic.

I'm sort of lost as to how to proceed at this point. Any help would be appreciated. Thanks.

2

your bootloader has crashed, Just upload code using avr pocket programmer or replace IC with bootloader.

method of uploading mentioned here

3

And, abruptly, it works again. I have no idea what is different.

Thanks!