Having issues with iTunes 11.1.5 on Windows 8.1

Ever since I've refreshed my windows computer two weeks ago. I am having issues with iTunes 11.1.5. For some reason I can access the iTunes Store, but most of the time when I do something internet related on iTunes, the app is either stuck on checking for downloads or when trying to sign in. I am trying to update all my apps but only a couple out of 30 actually start downloading but they keep getting stuck at "processing file". I have used another computer with Windows 8.1 with the same version of iTunes and its downloading app updates fine.