What about System Restore? Have you tried that? Just pick a file dated before your computer began messing-up.
You may try http://forum.adiscon.com/ptopic,1764.html for the DCOM erors. http://www.jsifaq.com/SUBJ/tip4800/rh4820.htm for the Service 7001, and...
Good question, since you provided several possible solutions. A word of caution for users of Windows 2000 earlier than SP4. Microsoft states...
Try downloading and installing the lastest driver for your specific printer directly from HP at:...
Separate names with a comma.