Nano problem

Oh dear and wonderful Gods and gurus of Arduino.

Please take pity on this poor traveller in a foreign land.
Ok so I wrote my sketch and tested it on my Uno, bread boarded it, prototyped it and got it to the church on time. So far so good.
I then purchased a couple of Nano boards (I need small for the finished item), I plug them in, change the board type in the tools and try to load the sketch, result? Naaah!
I believe the boot loader is installed and the boards are working ( red LED flashing ) but the computer does not seem to even recognise the board is there (plug in the Uno and it installs and lists it, unplug the Uno and hear the familiar Bing Bong). Plug in the Nano and Nixt, nuffink, not even a sausage!
Tried starting the Serial monitor and got “Board at com 5 not available”
When I try to upload a sketch (with the verbose option enabled) I get the FB below.
What am I doing wrong?
Thanks for any help,
Kind regards,
Jeff

: 1.6.8 (Windows 10), Board: "Arduino Nano, ATmega328"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware "C:\Program Files (x86)\Arduino\hardware" -tools "C:\Program Files (x86)\Arduino\tools-builder" -tools "C:\Program Files (x86)\Arduino\hardware\tools\avr" -built-in-libraries "C:\Program Files (x86)\Arduino\libraries" -Uflash:w:C:\Users\Jeff\AppData\Local\Temp\build258b217637abe96b17346cea9d5ba72c.tmp/ASCIITable.ino.hex:i

In here ther are a lot of similar lines that the system wiill not let me include!

avrdude: Version 6.0.1, compiled on Apr 15 2015 at 19:59:58
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

Using Port : COM5
Using Programmer : arduino
Overriding Baud Rate : 57600
avrdude: ser_open(): can't open device "\.\COM5": The system cannot find the file specified.

avrdude done. Thank you.

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

Try to install updated drivers for CH340 - it partially helped me. Now my PC can recognize my Nano, but still can not upload there anything.

Indeed, two things.

Install the correct driver. If you bought it in China/eBay/AliExpress/etc it's probably a CH340. Driver: CH341SER.EXE - 南京沁恒微电子股份有限公司

And select the right COM port. It doesn't get the same com number as the Uno.

How right you both are, thank you.

It was both the CH340 driver and the com port. Strange thing was the com port option was greyed out at first and I could not change it.

I also found that damned data cable I bought (said it was for both Data and Power) wasn't and only delivered power.......

That went back to the god's of Tesco!

Thank you fellas.

Just got to get my head around a million and one other things and I might be getting somewhere.

Jeff.