I had to install the DirectX user runtime recently and was pretty shocked to see Microsoft has loaded it up with lots of crapware. First when you click download from its page at
http://www.microsoft.com/en-us/download/details.aspx?id=35 you're prompted to set MSN as your homepage, download the malicious software removal tool, and download IE11 (if you're on Windows). Then after you skip that you get the download and when you run it it will try to get you to install the Bing bar in the installer. Overall just a really shady and crap experience, especially coming from Microsoft.
Also agreeing to set MSN as your homepage with the install bloats the download size from a svelte 286kb for the DX web installer to 2.4mb (just to set a homepage!?). Way to completely defeat the purpose of providing a small installer by bundling in crap.