Reliable detection of Win98 may not be possible. As the clot starts to get hard and dries out, a scab forms.
Scabs are usually crusty and dark red or brown.
Their job is to protect the cut by keeping germs and other stuff out and giving the skin cells underneath a chance to heal. If you look at a scab, it probably just seems like a hard, reddish glob sitting there. New skin cells are being made to help repair the torn skin. Damaged blood vessels are being fixed. White blood cells, the kind that fight infection to keep you from getting sick, go to work by attacking any germs that may have gotten into the cut.