Itunes won't even start

I have had my new laptop for about a month now. When i first got it itunes worked great! Better than my PC. about a week into having it itunes stopped working. At this point whenever i try opening it i get the error Windows cannot open this program. What is wrong with my computer. Is it just vista or is it possibly something else?

 

I would try to re-install iTunes. I had some problems initially, but iTunes had a patch to use with Vista. I now have iTunes 7.3 and not having any problems.