Vista not updating waptirck xx
Also make sure your laptop and your phone are Authorized on your Apple ID.
UPDATE Related to OP's comment: Don't try to upgrade from inside i Tunes itself.
If you can’t install i Tunes on your Windows PC, or if you see “error 2” or "Apple Application Support was not found" after you install the software, follow the steps below in order.
If you see a different error when trying to launch i Tunes, learn how to fix unexpected quits or launch issues.
I have installed the update to my i Phone after backing it up however I have an old version of i Tunes and it will not let me update it on my Windows Vista laptop (tells me I need Windows 7).If you have, and it still doesn't work, then update your i Phone over Wi Fi using the App Store and don't connect it to your laptop until you can contact Apple to see what is wrong.I would be concerned about loosing the back up, but I don't know for sure.All kidding aside, you could use the msn gadget but it was modified by someone in Korea..."Modify by Domain / Dorice, dyhan81" and "Convert to Roman pronunciation Added by someone"So your taking a chance there.
If you are determined to still use a weather gadget you may have to use a different one.