According to PC Data, 61 per cent of US households are equipped with a PC. Nielsen/Net Ratings reports that 162 million people in the US access the Internet from their home PCs. New technologies, such as wireless networks and ISDN/DSL Internet connections are becoming more accessible to, and desired by, home users - but implementation can be tricky. Upgrading Your PC: The Essential Guide uses a visual, step-by-step approach to walk readers through the most common upgrades, such as adding memory, wireless networks, and CD-R/W drives.