Just out of curiosity - what OS are you running?

What type of printer is it? Have you tried going into the Control Panel, deleting the Printer, uninstalling any special drivers/software for the printer, shutting down your system, then reinstalling? As Ms. Mittens pointed out, you should look at whatever was done to your system right before you began having these problems. The 'loud screeching' coming from your printer sounds like a motor, belt or fan which may be going out, have some type of obstruction or possibly has a loosened connection of some sort. Without knowing the type of printer . . . I can't get any more specific. Was the printer moved, dropped or knocked over/around recently?

V.