I recently have a problem with my Canon BJC-2100 printer,
in that the printhead cartridge system became clogged. I
paid $55 for a new printhead cartridge, put it in my
printer, and began to get the error message "There was an
error writing to USBPRN01 for the printer(Canon BJC-2100);
Invalid access to memory location." I had no such problem
in the previous four years. I can't even print a test page.

I have uninstalled and reinstalled the printer material
from Canon and/or from Microsoft at least 6 times, but have
had no improvement.  I took my printer to a
Canon-recommended repair shop, which charged me $30 for
diagnostic tests to tell me the printer was OK, and that
the problem must be in my [Gateway] computer with my
software. Whenever I go through the "Windows Help and
Support" routine, I am told to contact the manufacturer.
"PC-Doctor for Windows" tells me everything is OK.  Can
anyone help me get my printer going?  Thanks...