The bio-hazard symbol used to indicate the presence of toxic bio-hazard material is quite a fascinating symbol. The whole mystery behind it and potential for irreversible damage can be a bit interesting and really alluring. This windows theme comes with 25 high definition images that are superb and well engineered in every way. It is guaranteed to bring out a little bit of mystery and danger to your desktop. It is easy to install by simply downloading and double clicking. The windows theme is compatible with windows 7,8,8.1 and 10. Create that mystery on your desktop with this cool bio hazard wallpapers today.