In an ideal world, all PCs would have exactly the same hardware configuration, and it wouldn’t matter what you do on your PC, how much hardware or software you load, what software you download from the internet, what you install on the computer, what you remove and uninstall, or how many different programs you launch concurrently. Unfortunately, we don’t live in an ideal world. And you don’t have to use a PC for very long to know that things don’t always work the way they should. In fact, in the real world, if you buy the exact same PC as your friend, with the same operating system, you are likely to have two completely different computers in a very short time.
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