I have Windows Defender already on my computer, without knowing this I went to ad-aware free downloads and tried the spybot. This showed 2264 parasites on my computer. I was then prompted to pay for the cleaning service. (even though it said free)
When I tried to download Windows Defender it told me it was already on my system, so I ran a scan and it says I have nothing and gave me a clean bill of health I guess you could say.
Why the difference and does Windows Defender even work? Or is Spybot just trying to get my money and making parasites up?
I know nothing about this stuff. I also have Norton Anti-Virus installed and am always checking on there as well.
Thanks in advance for the help.