The best you will be able to manage for your scanjet is letting Windows 7 find the driver. HP ended driver support for your scanjet at Windows Vista.
Connect the scanjet to your PC and use the Devices and Printer "add a device" wizard. If Windows 7 has a built in driver fantastic, otherwise you may be out of luck. It may be time for you to consider looking for a replacement All-in-One multifunction printer. Microsoft has recently retired the Windows 7 hardware Compatibility Center that made making decisions about older generation devices and Windows 7 simple.
If your problem is solved or question answered by my post, please click the Accepted Solution button in that post.
This worked for me. And the file is still available.
The proposed solution didn't work for me, but I ended up finding a link from HP that did solve my problem: