per the instructions, as you did 6 years ago.
If it still fails, it might very well be broken. Then try it on another PC, again from scratch.
I have a HPscanjet 3400C scanner. It is about 6 years old and I have had no problems with it until this week when it will not operate. When I start it I get an error message saying Not initiized and computer cannot reconize scanner. I am operating on windows XP SE. The only thing I can think of is just before this happened I did clean up my computer using ADAware and Super antispyware programs. Any chance I deleted something needed.
My software for HP seems to be there.