Oh no! ):
I think you picked that up from the adfly with that download, but it's understandable. It can be a little hard to navigate and it does happen.
Firstly, what's your computer, a windows 10, mac, chromebook? If you have a windows you should have windows security and should allow you to run a virus scan. If not, I highly suggest malawarebytes as a good software.
Again, I'm really sorry that this happened to you