Keyboard And Printer Drivers?

I have been coding in dBase since 1982. Upgrading to Win95, 98 and ME was no problem. But now that I have upgraded to XP on a 3.2 ghz Intel machine with a gig of ram, I am having two serious performance problems. I am using dBase IV 2.0.Keyboard input is slow and sporadic to display.Printing is delayed by up to a minute, but will execute immediatley if I exit the program. I have tried changing every aspet of the short cuts properties, including compatibily option, and executing it from CMD.EXE instead of COMMAND.COM. But nothing seems to help.I should also note that the program performs well in full screen mode, but not in a wondow as desired. Also changing LPT timeout value in the registry from 15 to 3 has helped the printing issue, but a 10 to 15 second delay remains.