Windows 7 uses drivers to communicate to various hardware devices connected to your computer, including printers and scanners. Printer manufacturers provide drivers with their products, but also ...
There are many reasons for this problem; one of the reasons is that Windows Update failed to install or update the Network drivers, in that case, you have to update the required driver manually.
If you've attempted a fresh install of your operating system, you may have discovered that some hardware drivers are not included in all installation disks. There are so many different manufacturers ...