Is it possible that somehow the default printer for Explorer, Photoshop and Picasa has got corrupted/inadvertently changed? You may want to check which printer is set as the default for those programs. I've had problems in the past where a printer is set as the default printer, but not all programs - e.g. Chrome - see it and keep trying to use a printer that was previously installed.
HTC U12 Plus review: Hands-on