I have used Virkon in the past as Anebel suggested. This last time I did the entire barn I used a hospital grade disinfectant (can't remember the name but could find out - it is also used in vet hospitals and kills everything including parvo) my Dr. is my only boarder and I got the hook up and it was less expensive. I diluted it as instructed and put it in the sprayer on the back of my 4-wheeler and made quick work of it.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.