Any chance you could zoom them out a bit?
No.3 is not a hair strand.... Afterall what the heck has hair got to do with computers.
No.3 is spider's silk - ie The web.
Search google images for ideas.
https://www.google.co.uk/search?q=2...e=lnms&tbm=isch&sa=Xbiw=1920&biw=1920&bih=955
Any chance you could zoom them out a bit?
Answer for 1 possibly virus?
good one, probably is this and three is a web.