What Windows, Printer(usb or network) do you use, when happened it the first time, did you try to disable the Spooler, what AV-Programms did you use?

You could also post a Hijackthis log:
Download it here http://www.tomcoyote.org/hjt/ , then unzip the file and double click on the “HijackThis” icon.
When finished loading click on the “Scan button”.
Next click on the “Save Log” button. Save the log somewhere you will remember and open the log file with notepad. Then copy the contents and paste them in a reply to be checked. (Taken from http://forums.net-integration.net/index.php?showtopic=6624)