Irfanview

I just tried adding Irfanview.. after the download its not showing to be installed. Tried twice... Had Irfanview before, but never had this issue...... THX

You have to click on the file that downloaded and install it, unless you were given the choice to run it, it won't install by itself. But I would suggest you forego Irfanview for a better image editor:

FastStone Image Viewer is much better, does a lot more and is also free.