Irfanview is a very popular program and lots of people use it. I have no idea why you would get that message but why don't you go here and try it at Tucows:
Hi Dave that is a new part of windows XP SP2. When you see that, it is to make you think, do I really want to get this file. If you do as in this case, just click on the yellow bar, and it will let you get the file.
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