At university, my daughter uses an Acer 1350 notebook with a Lexmark X85 all-in-one printer/copier/scanner device.
From the outset, unplugging the the printer's USB plug and re-connecting later resulted in a failure of the computer to be able to communicate with the printer. Re-installing the printer software has to be done each time, rather a chore! And presumably there are numerous printer driver copies dotted around the hard drive.
I asked her to check whether there's an updated driver but the one she downloaded (she says) looks to be the same as the CD version supplied with the printer.