Vista - Driver automatically reinstalls when printer is turned on

I've got an HP C6180 AOI, running on Vista. We've had numerous
problems with the drivers and app but have managed to resolve them.
But this week, everytime we turn the printer on, it causes the driver
to be reinstalled. (We sometimes have large print jobs that causes the
printing to bog down. A reboot of the printer seems to help this.)
When the driver reinstalls, settings are reset to defaults and other
users on the network have to delete the printer and reinstall it.

Any ideas on why this is happening and how to fix it?

Thanks,
Joe

You are not the only one with this.

I don't know the answer except it may indicate an incomplete
installation. The other user (not here in VISTA) reported that it kept
asking for a specific tmp file that could not be found.

Did you have UAC turned on or off when installing the printer software?
Having it OFF upsets Acrobat Reader installation, I know, and that is
to do with not being able to access a tmp file.