I have had this problem come up twice now. I fixed it (after 3 months of installing/uninstalling and talking with a wide variety of "experts") and everything worked for about 2 months. HP says the printer, router, etc., are all working fine. MS says they've fixed the problem and my printer is compatible with my computer. Now I get 'cannot find driver' or 'printer offline' messages again and am unable to print. I have a Dell Inspiron 3000 series desktop and an HP Envy Photo 7855. I can print from my phone (Samsung), my Tab E, my husbands MAC, and the iPad. ??????