I once spent a couple of weeks working a thing called the the X-Prize Cup (some of you gamers may know of it indirectly, but it had nothing to do with gaming). One of my assigned tasks early on was to purchase & install 4 printer/fax/copier machines. Hit the local Wal-Mart & picked up 4 HP All-in-Ones. Spent damn near 48 hours trying to get any one of them to work on 3 different computers, half that time talking to HP support it seemed. The installation routine locked up each computer it was tried on, never got any of them successfully installed, let alone working. When the HP support tech finally told me I needed to reformat my hard drive to get a clean install, I told them to get serious (in less kind terms), returned all 4 of them and bought some printers (Konica) & dedicated fax machines (Brother) which installed in minutes without a hitch.
I give HP equipment a very wide berth, so as not to end up as collateral damage in a scene like this.