Apple application and support do i need this on my pc

If you're not using iTunes, Safari, QuickTime, or any other Apple software, then probably not.

Itunes also installs bonjour as another program you can remove if no itunes. There are probably bigger fish eating up your hard drive, I like to search for files larger than 5000k, see what I can live without. There are other options if needed, disk cleanup can help, my computer right click on c, properties, disk cleanup.