Hp designjet 93:11 - HP DesignJet Z2100 InkJet Photo Printer

According to the service manuals there is no memory upgrade for the 500 and standard memory is 16mb.. The 800 and 510 only have upgrade capability.

There are free software you can download for this designjet 750c by finding at websearch like yahoo.com or msn.com. Just type the driver name for this printer and you can download it for free. Most of the printer driver now can be downloaded online with free cd key. Just let it try. or Maybe the printer you are installing is not compatible with windows 7. try to read you printer's user manual.

Here the link:

http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?pnameOID=377949&locale=en_US&taskId=135&prodSeriesId=25301&prodTypeId=18972

Check theses HP FAQs for your printer:

• HP Designjet 10/20/30/50/70/90/100/110/120/130 - Troubleshooting USB Installation Issues in Microsoft Windows XP and Microsoft Windows Vista
• HP Designjet 100, 120, and 130 Series Printers - How to Activate the Maintenance Button in the Windows Driver

Manuals for the driver and plotter setup can be found here:
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=18972&prodSeriesId=24023&lang=en&cc=us

GO ON LINE AND DO THE FOLLOWING TYPE

HP DESIGNJET 820 PRINTER SERVICE MANAUL DRIVERS
ENTER

WWW.HP.COM/DESIGNJET
ENTER

ROD

Try this site, this should have what you need.

http://www.driverstock.com/HP-Designjet-450c-driver-download/10-26-1543/index.html