You can go to HP.com, look up your particular printer and find the most suspect area for a paper jam. It could be several places. As the paper traverses the paper path, it is timed. if the leading edge doesn’t get someplace on time, it will fault out. It could be your paper pickup rollers, or several other places depending on your make and model. LaserJet 4’s are notorious for output jams, for instance. Also, there could be a tiny piece of paper torn off and jammed into a corner somewhere that catches the next feed. So, if Mr. Knight’s fix doesn’t work, please post what type of printer it is (LaserJet 4, Colorjet 4030). What error code you receive on the display. The age of the printer. If it is an old printer, it is probably the paper pick up rollers. YouTube is also a good source of info for this type of problem.
If you PC will work with an old video card (GPU), it is not the PC’s problem. Your new GPU may be over powered for what you are running. Check the specifications to make sure you have enough RAM and that your CPU is powerful enough to run the new board. If all the specs are good I would suspect another item that a lot of people don’t think of, the PSU. If your power supply is not big enough, it won’t be able to power your new board. You can test it by removing all other boards from your PC except the GPU. If you don’t have other boards in there, like me, just replace the PSU with a larger one. Look at the label on your power supply. It will tell how many watts, it will output. i.e. 200W. Put in a 300W PSU, reconnect everything and try it again.
Have you descaled the machine lately? If you have hard water like I do, you would be surprised at the amount of gunk built up in there. Can you get a consistent water delivery? In other words if you press medium, do you get the same amount all the time? Have you tried the Keurig.com website? They have some good info. Also, a lot of good info on You Tube about the Keurig.
Unfortuneately, no. Windows cannot read Mac. But, Mac can read Windows. There may be a program on the Internet that will convert your old info to Windows but I don't know where you would look. Short of printing it all and reentering it, you're stuck with the incompatibility. You might try saving your text documents as Word documents on a Flash drive. Then you could read them and possibly save them on the Windows PC. That would work for anything in Microsoft Office. You have a few corrections so be sure to check your documents. I would think Adobe is Adobe on both. If you have something Apple specific. . . I've had some luck on the Internet but not much. Most of it comes out garbled. Good Luck.