Malcolm
'Meanwhile, I borrowed a WinXp laptop and MConfig works fine via the old COM1 serial port'.

Yes I followed the update procedure ticking the required items (after disabling antivirus) and eveything seemed to download. It was only when I tried to subsequently update the G68 by retrieving MFUP that the problem arose. I wonder if this is a Vista problem then if you managed to upload with XP? I am using Vista home premium.

Rod

818v3, QNAP HS-453DX, Roon, 7200SE, ARCAM AVR380, REL B2, Panasonic BD 80, LG OLED, SBox Transporter, iPad, F80. Shunyata Delta NR power cables.