I have been having the same issue since I bought my PC a year ago. I too have Vista....and it really bites. I have contacted Dell Support twice and got the run around. Once, I even had the non-English speaker remote in and try to fix it to be told too bad, so sad.
So after reading this thread, I have contacted Dell support via email and will post their response back. I am sure it will be another lame excuse. I tried the Dell Customer Service Rep's fix, but stopping and stopping the Print Spooler isn't going to fix incompatibility problems with the OS.
Perhaps it's time to learn finally learn Linux if Microsoft is going to continue to produce crap like Vista. And I will NEVER ever buy another Dell product.
Thanks for letting me vent