I uninstalled my friends hp

Question

i uninstalled my friends hp f300 3in1 printer, when I weht to reinstalled it, there was an error message, it was something about aadministor an on the left side od the box show a red x and it soai something like runtime. so what i did was restored the computer to a time before i uninstalled it. Now when I open the hp solution center I get an error message but the solution open but there is no writing. What did I do wrong and how can I fix my friends problem.