I'm trying to download my existing iTunes account onto my new computer. Whenever I push download nothing works. It thanks me for downloading and then nothing happens. There is no pop-up control in the tool bar. Help???

I'm trying to download my existing iTunes account onto my new computer. For one, every time I try and download it it takes a second and then says "thank you for downloading iTunes!" and after that there's nothing, no results, no download. I read the instructions, and I looked on my toolbar. There appears to be no pop-up control and I can't find anything relating to it. I have Windows 8, in case that makes a difference. This shouldn't be a problem, but it is, so....HELP???!