When making backup keep in mind that the keeper of it is very important. If you store the backup on your hard drive the chances for it to be damaged are big. They are even bigger when using floppy diskettes or CDs. One good way could be a fast ftp access or on other Internet location that is secured, big enough and fast enough for your needs. The system checking is another opportunity to analyze possible problems with your software or hardware components.
Every Windows system has tools designed to help you on that matter. On the market you can find some more advanced software too provided from Symantec or other software corporations.
The system registry is another part of your system you should know about.
It is made to keep almost every option that software and hardware use to work. Many programs could help you clean ...