To fix an offline printer in Windows 7, click the Start button, go to the Control Panel and choose Hardware and Sound. Click the printer to check the status. If the printer is not available, it shoudl show an "offline" status. If it is online and ready to use, it should show "ready."
If the printer shows that it is offline, change the setting to online. Click the right mouse button and choose "use printer online." The display changes to reflect the new status when the printer is online and ready to use. If this procedure does not fix the problem, a driver may need to be updated. Drivers can be downloaded through the Microsoft website.
Reasons that printers go offline include problems connecting to a network and power loss. Printers that connect to individual computers typically are designed to print small jobs. They typically print from six to 25 pages per minute, with a high cost per page. Network, or shared, printers are intended for printing at higher volumes and speeds. They usually are shared by multiple users on the same network and print between 45 and 100 pages per minute at a lower cost. As of 2014, Hewlett-Packard is the top-selling brand of inkjet and laser printers, with 46 percent of sales of inkjet printers and more than 55 percent of sales of laser printers around the world.