So I was up till 2:30 this morning, just purchased a HP M1217 MFP. So when trying to install the software I kept getting "must have admin privileges to install" or words to that effect. After force quitting it a couple of times and uninstalling it through the HP uninstall icon I noticed when I went to add through the printer & scan preference the HP printer was still listed under available printers. So my next cause of action I tried to go into Time Machine and bring it back to before I started this mess. I tried to restore the printer folder but got an error saying that I could not makes changes to said folder. So as of right now I'm lost and would be grateful for some help to get rid of HP software/drivers. Is Time Machine route the best solution or do I need to delete a specific folder? Sorry for being kinda of vague but being up till the early hours of the morning didn't help.