Your scanner could need color calibration as well as your monitor and your printer.
Color calibration programs for your monitor aren't cheap at all, but PSP does support color management. There are separate color calibration programs/devices for your printer, as well. Also not cheap, as Abby mentioned.
Check all the devices and see if there are color profiles available for them. The industry standard are called ICC Profiles. Install them, select them, and then start juggling until you have reached a happy co-existence with them.
That's the long-term advice.
Scour your scanner manual for calibration how-to information in the short run. It sounds like you've already kind of made peace with the monitor and printer as they are.