We have an HP scanjet 4400c series that we have used for a couple years with no problems. The past couple of days it will not scan hooked up to our desktop. We uninstalled the program and re-installed, still nothing. We hooked the scanner up to our laptop and it works fine, so it is not the scanner. It has to be something to do with our desktop. We have not added any new programs or hardware. We did have a problem with some adaware etc but we got those cleared up. We even did a system restore to a time when it did work and still nothing. Any ideas? I may not have given enough info. We have WIN XP, DSL and IE.