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Computer software covers the operating system for the computer and all of the software programs that are installed in it. Manufactures regularly issue security updates, patches, upgrades etc and if you aren't sure of what you are doing then it is possible to get it wrong.
Examples of computer operating systems are:
- Microsoft Windows 7, Vista, XP
- Apple Mac OSX
- Linux
Examples of software programs are:
- Microsoft Office
- Games
- iTunes
- Skype
- Email programs
- Windows Media Player