64-bit Win 7 SCANNER software does not install successful​ly for wired-netw​orked HP Officejet L7750

My client has an Officejet L7750 on his network (in the same 192.168.111.nn subnet), and it functions OK as a printer.  I downloaded and installed each of the three sets of L7750 software designated as working with 64-bit Windows:
HP Officejet Pro Basic Print and Scan Driver
HP Officejet Pro Full Feature Software and Driver
HP Officejet Basic Driver - IT Professional Use Only
The end-result is the same with each.  The software runs for a time, finds the printer, continues the install, then runs for about 10 minutes "configuring the printer".  After a time, it displays a dialog box saying that the installation failed.  Sure enough, there is no software to run the scanner, but the printer still works.  (I also ran the install a couple of times and the printer could not be found.  When I continued installation anyway, the software left an icon on the desktop with some pretty unhelpful info for troubleshooting.)
After each failed install, I followed HP's documented procedure to remove the incomplete software.
My client needs to use the printer's scanning function, and occasionally send faxes, but cannot do so without a working L7750.  Of course, Windows 7 cannot even recognize a networked scanner.  Suggestions?   Do I have to move the printer to the USB port on one of the computers to have a working scanning function?  To do so would be mighty inconvenient, and essentially negate the networked capability of the printer.  Can the L7750 operate simultaneously as both a netwkred device and a USB device on a computer?
Thank you.  This one has me really stumped... Ben

Hey @RobAhl,
Welcome to the HP Support Forums!
I understand that you're not able to scan properly with Windows 7 64 bit. As you already know, while the Windows scan and Fax program is handy for basic scans, it is not practical if you need to scan PDF Files. I would be more than happy to assist you with your issue; however, I'm going to need a bit more information first.
What colour Laserjet is this in regards to?
How is the Laserjet connected to your computer?
In the meantime, on the HP Support Website there are Full Feature Software and Driver downloads available. Should your Laserjet have Windows 7 64 bit support than you should be able to go to the HP website and download the appropriate drivers as they are required in order to have full scan functionality.
Drivers & Downloads
Please let me know what you find out. Best of luck!
X-23
I work on behalf of HP
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
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