Review the other boxes and the list of support documents further down the page in case one of them applies. The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach.
Should you want to bring things up to date howver, and have problems updating, then for general advice see Troubleshooting issues with iTunes for Windows updates.
That version is quite old now, though its fine if you don't have a device that requires a newer version for syncing or want to use the latest features.
