>> Went through this nonsense with several HP 4500s (different Sub-Models) when trying to install (Setup) the "latest" available Full-Features SW and Drivers downloaded package. Finally, after some W7 poking-around, "while the various HP scripts were running"... managed to successfully install the HP drivers (printer object / imager (scanner) object / DOT4 (USB-port-related) object / wireless transceiver object / internal PrintServer object) and the HP Solution Center (to remotely access Printer Settings / Ink-Levels / Et al) SUCCESSFULLY... on THREE different PCs in the same Client home. Two Laptops printing wirelessly via the Client's local GDI/Router/WiFi Box, and one Desktop printing via USB cable.
>> The KEY is to realize that HP did NOT have their 3RD-Party low-bid (foreign) Coders write ANY Drivers for Windows 7! When one unpacks the HP files into the (idiotic) ..\User\AppData\Local\Temp location (FYI: do NOT change the Default, or the poorly-written scripts will NEVER find their files!)... one can quickly discover ALL the driver files are for XP or Vista ONLY. Fortunately, Microsoft Coders DID write good stuff, and Windows7 'can' recognize and install such older Drivers in "Compatability Mode" automatically, when needed... without the User needing to do anything manually.
>> A "part" of HP's vast Organization 'has' all-too-slowly paid attention-to the Hundreds-Of-Thousands(!) of complaints from Users who want to actually keep-using their "PAID-FOR" HP 4500 Printers. [ HP and Dell and Etc 'Official Position' is that WE should "buy a New Model of Printer" whenever there is a new version of Windows! That would make everyone's life easier, eh? That is what they will keep telling us... ]
>> SO... part of HP has actually developed an "Install Wizard" that we should ALL download and use. BUT... first y'all have to find, or download-and-find the HP "Level 4" UN-installer script. [ And after running it, those of us with more experience should do further MANUAL cleanout of HP Files, and objects in the W7 Registry. As always, BACK UP YOUR W7/HDD 1ST! ]
>> Be aware that the Install Wizard REQUIRES a www connection, and it will take a good while for it to download the Files Package(s), which it will run afterward. [ And yes, it downloads a Fresh Copy each time; NOT checking 1ST to see if there is already a Good set of Files on your HDD. HP coders chose to do this Purposely, and to have the Users run the Level4 UNinstaller script, 1ST... to try to start out with a 'clean sheet'. ] *Do NOT connect the USB cable from your Printer UNTIL script asks you to...!
>> The other SERIOUS fault in the HP 4500 "install" scripts is: they will try to install a new-Version of Adobe Flash Player, from an Adobe web-page/file that, effectively, DOES NOT EXIST! [ FYI: the "HP Solution Center" c**pola runs within a Customized Web-Browser 'engine'... NOT as a normal / installed Windows Program! That web-browser BS-solution REQUIRES the latest Adobe Flash Player. ]
>> Worse yet, the Coder bozos's scripts do NOT check 1ST(!) whether you already HAVE the latest Flash Player... the script just trys to access a non-Existant page/file...... and a "process" just sits there, running in the 'background' of Windows 7, STUCK FOREVER. One can open up the W7 task Manager, and see it.
>> END that TASK(!) as soon as you see it running in W7 Task Manager.... then, and ONLY-then, will the Installation Scripts continue. And there are NINE scripts which run, one after the other... UNLESS you have chosen a 'Custom' install, and UN-checked the SW items you do-not-want-or-need (!), such as OCR / WebPrinting / ETC. *Your specific Model may run a different number of scripts, but one can "watch" each script and it's sub-objects pop into and out-of existance in the W7 Task Manager.
>> If you already have your 4500 setup and running, just bypass the 'Set up Printer' screen. At the tail end of one of the last scripts, a screen will appear that helps you set up ALL of your wireless configuration items (if, you will be printing wirelessly from your specific PC/Laptop). *When you have those done, it will ask if you want to Print a page... DO that, and, DO print the NetworkSettings page, so that you will have the Details for later when needed. Good Luck, everyone... your gonna need it.