Hard to tell what's wrong.
You get preboot
HWID is right
firmware is right
Drivers are updated
.rgn is in the same directory than Updater
Updater sees nuvi
You are using XP
I've no idea, try another pc, try another cable, try to redo cure from scratch, try using a previous firmware.
how ? try to redo cure from scratch
I try with this method and tell them, What other method are not updater.exe?
in 5 minutes upload a new video of step
Garmincure and updater.exe dont have solution
Yes i have but not use in the garmin, Why ?