topic is a bit misleading - it's not printing that is slow it's the part of the process just before the OS print dialogue pops up and you get to click print. There seems to be a pregnant pause between the part in the barcode applet where you click print and the print dialogue popping up.
Sounds like it's looking for something that either isn't there or needs to be searched for. Not familiar with the product, but someone mentioned Dependency Walker as a helpful diagnostic tool. This might be just the excuse you need to purchase this for your toolkit. ;D