Glad you solved it! You should know that if you attempted to upgrade from W10 v1511 to v1607; this type of thing is not uncommon. If you search on the Anniversary Update thread; there are now like 4 of them on this forum, you will see that so far out of the thousands of people getting this new September AU update, only 1 person I know had the update go in smoothly without issue. Microsoft is aware of the problem and seems to be fixing it. As of the August 2nd v1607AU release date, the first 6 weeks or so, the AU update wasn't even being pushed out to anyone (though we have a few appearances where it appeared that the AU came into people's computers and scrambled them; including a couple of my Clients). Now that's it's being pushed out, we expect this sort of thing to continue to happen, especially if people are using 3rd party applets such as you did with your dark theme thing.