Spyware and Adware, two feared words

Why are spyware and adware so deadly? Spyware programs find their way onto your computer, and then obtain information about you. They hide on your computer and kind find out information you don't want them to know by varying techniques. The threat of these programs vary. Some use them to find out how to target people with advertising, while some attempt to find credit card numbers, passwords, etc. As you can clearly see, the latter group of spyware could be extremely detrimental to you. This is why it is so necessary to check you computer for spyware on a regular basis

Adware can be different from spyware, but nowadays the two are usually bundled together, so I won't bother talking about the differences. If you want to find out more, wikipedia and google are great places to start :)

Now about getting rid of these programs. There are very many programs out there that do this, but since I'm on a Mac, I don't have much experience with them. But I'll link you to some you can try. Here's one and Here's another.