I'm with Ian on this Ted. Your printer has 64-bit drivers.. that is, HP have 64-bit Win7 drivers for it. Gads.. they even have Win8 drivers for it so drivers-wise.. everything is out there you need. You're not getting a little bored and fancy something else do you?
I had a 5540 at the pub.. mainly for the scanner and fax though the fax became redundant.. no one faxes anymore. It wasn't the best quality bit of kit I've ever had but it did the job I bought it for and didn't break the bank. I found the cartridges pitifully small. I also had a Samsung ML1210 B&W laser for printing mundane stuff.. leaflet drops, that sort of thing and for colour.. I had an HP990Cxi which I have to say was probably the best printer I've had. I'd still be using it now were it not for the fact it was packed at an angle for moving up here (didn't have the original box) and as a result, the cartridges leaked.. all over the main board

It had a double-side print adaptor too so I could print both sides without having to fart around reloading paper.
The toner cartridge ran out on the laser and these cough up at around £50.. hence my reason for buying the HP1050A at around £26 inc postage

You get what you pay for mind you. This said, it does everything I want.. quick scans and the odd doc print. Quality is similar to the old 5540 but leagues away from the 990 Cxi.. now superceeded many times over by HP. The 1050A doesn't have a fax.. I don't want a fax, I don't need a printer that will fax.
In the end, it all boils down to what you want to use it for. If you want high quality text and picture prints.. you'll have to pay a bit extra but in any case, you should be able to pick up a decent unit for £100
ATB
DaveB
