BEWARE that the install process may start automatically if old device is connected and powered ON plus you're connected to the www. Check system tray for status icon.
Old Printer and New OS: driver install with Win7
A new OS may cause grief as no new drivers are available for re-install of your printer or any old device for that matter. You either have to wait for the maker's new driver release or make do with any 3rd party support.
Windows 7 offers a defaulted install of at least your old printer and
possible other ophaned devcies. This DOES NOT mean complete full capabilities as was once had. A more generic approach is encountered here, thus limited use and/or less bells and whistles supported as was before. At least you can access for printout and such.
Instructions: Assure old printer/device is powered ON and connected to PC. Next, you're connected to the internet, then goto the control panel->find h/w and sound section->click add new device->Win7 will search for new device->windows update status window appears or click at system tray the new icon(green dot rotating on PC case). Wait until completed and use new device or reboot.
You may consider a new printer or device to replace your're old one. Of course, it must support the new OS and must state so. If you feel you lost too much capabilities, then again, replace printer or device. In this way your support from the maker is expected.