first thing: you need to free up some space on your C: drive. I recommend having atleast 20% free space at all times. your computer needs this to work efficiently. This can likely be accomplished by getting an external drive for your music & video files. If you are like me you probably have many GB's of music and or movies. Think of what you can really do without. If you just have a small drive then you just have to thin out what you do have.
2) Use Window uninstall and remove the existing OfficeJet software completely.
3) download and install a trial version of Diskeeper 2008:
http://consumer.diskeeper.com/downloads/Downloads.aspx?RId=1220&SId=1&CId=1&Aeid=0&Apid=0
download the Pro version. If you like it buy the home version. (cheaper but if your going to use a trial, might as well use one of the high versions - has more features that might help with initial cleanup)
4) Download System Mechanic Pro 7 trial:
http://www.iolo.com/SM/7/pro/download.aspx (to register for it you can use wrong name and fake email. eg
you@me.com - this will get you the trial without all the spam unless you want to recieve some email 'deals' they are good sometimes) When installing - I suggest that you DO NOT install the antivirus or spyware software. Just install the main program. Once you have it installed - use the Tools/individual tools/enhance protection and run the 'back up or restore registry'. After that use the Tools/individual tools/repair problems and run 'Repair registry problems'. After that use the Tools/individual tools/Increase Performance and run the 'compact registry' on next reboot. - reboot and your registry should be much better. Do not use the defrag in this program. Diskeepers in much much better.
5) reinstall the Officejet 7140xi software using the latest version from HP. When I install any peripheral devices I never install all the software included on the disk. I just install the drivers. You might have the option to pick what is installed. The only thing you need is the drivers. Windows XP has great built in software for doing the stuff that the 'spam-ware' included on the installation disks can do.
This should be it and it should work now.
I know that it sounds like a lot of work and it is, but I have dealt with what you are dealing with many, many times. This is what lead me to not installing the "included" software and only the drivers.
If you don't want to do all the steps listed above, at least do step one, two, and five.
The software I have suggested are only programs that I have had the best luck with. Everyone has there own preferences. If you don't like them try something else.
I hope that I have been of help to you.
SUB