Hello Craig Arnott.

'ETC' means all USB devices except CPU / Motherboard / Video card / Multimedia card / Ethernet. In this case, this include your 'HP Deskjet F300' printer. It's program bug. I'll take care of this v11.11.

Try to use the driver of follow link.

ftp://ftp.hp.com/pub/softlib/software10/COL15106/oj-40457-2/CDA_DriverOnly_NonNetwork_enu_NB.exe

Thanks for using 3DP Chip.