Images Of Infections From Spa Pedicures Computer Infections, Help Me? D:?

Computer infections, help me? D:? - images of infections from spa pedicures

I downloaded Spybot Search and Destroy, because my friend told me, and found 560 infections on my computer. The sites are usually Tumblr, Twitter, Facebook and Yahoo attended, others less. But I FrostWire is an infection of the computer? And the move by some iinfections? Even save images on sites like Twitter and Tumblr, but do not believe that the virus causes. I really do not know the money for an anti-virus applications ... : L What can I do? Thank you!