If you're looking to download iTunes, don't, whatever you do, search for the download using a search engine.
Because there's no end of malware and junkware in the listings. Unless you know what you're doing, you can find yourself downloading nasties in the process. Most of the time you don't just get iTunes, but some other bundled adware, but sometimes you can get really unlucky and pick up malware that will infiltrate your system.
The only fully trustworthy place to get a copy of iTunes from is Apple.
Stay safe out there!