How to maintain your pc

Make a backup copy of any important documents:

A "document" is a file that either you or somebody created using the keyboard, be it a letter you want to hang on to, a database, a report, finance records, translation work, composition, etc. Or it may even be a music file, video file, or graphic file. You should keep duplicate copies of files that are important to you and would be a loss to you personally if your hard disk fails. "Valuable things come in small packages" applies to computer files too
You can save it to any cd or floppy disk.

Keep your antivirus software updated

If you use an anti-virus program it is important to keep it updated regularly. New viruses and e-mail worms are coming out constantly.

Uninstall applications you do not use

Install only the software you know you actually will use frequently. The more applications you install, the more your Windows system will slow down. It is not a good idea to install anything and everything you come across unless you know you really need it and is recommended by a source you have come to trust

Don't hold down a key too long unless...

There are only 3 keys you should hold down on the keyboard: The Ctrl key, the Shift Key, and the Alt key. The rest you are supposed to tap quickly or they will repeat themselves. When you need to use either the Ctrl, Shift or Alt key in combination with another key, hold down the key first and then tap the other. For example, a hotkey combination to close an application is Alt + F4. You would hold down the Alt key while taping F4 to make this work.

disk defragmentation

Regularly use disk defragmentation to keep your hard disk healthy.

Registy Cleaner

Clean your registries regularly because registries also slowers your computer speed. Use good registry cleaner softwares.

Firewall On

Keep your firewall on when using internet because some danger files can enter into your computer and can ruin your digital life of computer.