Problem solved! - It turned out to be a faulty RAM module. I have now updated 8.02 to 8.1 with no issue.
As suggested I ran memtest86+ and it noted that there were errors.  I then changed the RAM with some spare I had from an old laptop and ran the update from within 8.0.2 and hey presto!  It looks like the Revo3700 has some life left in it after all ![]()
Thanks so much for your help guys! You create amazing software and I'm grateful you take the time to help users out to solve our problems.
Kind Regards,
ceekdp