Upload Program How Do I Re-install The Program To Upload My Pictures From My Nikon Cool Pix Camera?

How do I re-install the program to upload my pictures from my nikon cool pix camera? - upload program

Some time ago my computer had a virus and I deleted a few useless things to do, my computer go faster, and I accidentally deleted the program to download photos from my camera. Can someone help me please? best answer gets 10 points .. thank you so much!