There's a lot going on in this preset, so you could be picking random things to test for a while. Do you have an older edition of the XML you can upload that was working, which can be used to compare against the broken one? If not, try to explain as much information as possible to help, because guess and check line elimination on a huge preset isn't efficient. I.E. What list of things changed from when it was working until now?
If you want to continue trying to reverse components though, I'd expand the search into related items that may be sharing some files, such as Windows Media Player. I noticed you uninstall that, but it's known to cause substantial problems in a lot of user software. Another one to reverse is <c>microsoft.ecapp 'Eye Control'</c> and anything else related to eye/iris/face and infrared/usb to see if those help.