What is Apple iTunes (https://en.wikipedia.org/wiki/ITunes)
What's inside - https://support.apple.com/en-ca/HT205636
Download from the usual location - https://www.apple.com/itunes/download/
For those that do not synch their Devices often you may safely disable this MSCONFIG item - iTunes helper (http://www.systemlookup.com/Startup/4978-iTunesHelper_exe.html) Re-enable the item to safely synch your devices once again.