Most computers begin to suffer stability malfunctions with continued use, although to a different degree that may depend on different factors. Reduced stability that manifests itself in various PC malfunctions may be caused by a wide array of issues, most of them related to system elements and the damage it may have sustained. Over time, with software installs and uninstalls, as well as other PC activity, system elements get filled with outdated or corrupt entries that may cause application or system malfunctions and lead to PC boot up issues, computer or application freezes and crashes, PC power issues, as well as various other computer malfunctions. An effective way to repair computer malfunctions and resolve other stability issues on a PC is with the help of special PC repair software that safely performs system elements cleanup and repair, and tunes up system settings. The article provides details on the symptoms and causes of PC malfunctions and shows how to fix a PC.