= If you have an I/O PC card—that is, a PC card having an external connection, such as a network card—remove it when you're not using it. Some I/O cards use significant power, even while they're inactive. = If you work with an application that uses the serial port or...
You may also want to test the PC card with diagnostics. See "Testing Hardware Operation." Performance problems If the computer pauses or runs sluggishly • Press Ctrl+Alt+Del to see if an application is not responding. • Reboot the computer. • Delete temporary and unneeded files. •...