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the course covers upgrading, and looks at the BIOS (Basic Input Output System), add-on cards, memory and drives. There are a couple of problems here. For example, there is considerable variation in the BIOS of different PCs, and this is a general course that has to apply to everything. Another issue is that this is only a brief introduction, and does not go far in explaining what those mysterious BIOS settings actually do. Strangely, the course covers replacing a floppy drive, but not the more common and difficult process of replacing a hard drive. Both courses include tips and review questions so you can check what has been learnt. It's best to think of this tutorial as a user-friendly introduction to how a PC works and what can go wrong, rather than as an actual troubleshooting guide. By following the course, users will know whether to take the next step and get some more detailed resources. --Tim Anderson
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