This document provides tips for optimizing PC performance. It recommends letting the PC fully boot before opening applications, refreshing the desktop after closing apps to remove unused RAM files, and not using large wallpapers or many desktop shortcuts which use RAM. Other tips include emptying the recycle bin and deleting temporary internet files regularly, defragmenting the hard drive every two months, installing large software on a separate partition, and disabling tray icons and automatic startup of apps. It also suggests protecting the PC from dust.