• When was the last time it was working?
• Do you remember making any changes to the computer recently?
• Does this only happen with the printer?
Windows might be turning off your network adapter to save power. You can try turning off the power-saving option in the network adapter's properties.
1. Open Network Connections by clicking the Start button, and then clicking
ControlPanel. In the search box, type
adapter, and then, under Network and Sharing Center, click View network connections.
2. Right-click the connection and then click Properties. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
3. Click the Networking tab, and then click Configure.
4. Click the Power Management tab, clear the Allow the computer to turn off this device to save power
check box, and then click OK.