Recently, my (Windows

computer is doing something weird. Every now and then (maybe once every few hours?) seemingly at random, often while I'm just watching a video or something, my default browser (Chrome) opens a tab to the url:
http://go.microsoft.com/fwlink/?LinkID=219472&clcid=0x409I did a virus scan, nothing. I tried a Google search and it seems it has something to do with Bing and the solution is to remove all Bing-related programs and apps from the computer. I have definitely never allowed that abomination onto my computer, but I went through and checked - no Bing anywhere. The only reference I could find to it anywhere is in the IE extensions (and I've never opened that browser since getting the computer). It's listed as the default search engine and can't be removed. But no programs, no apps, nothing.
This only started happening recently. The only thing I installed recently is software for my new graphics tablet - just drivers and a drawing program, nothing that should do anything to a browser. I haven't updated Windows either, except to try to update the virus definitions - and that freezes every time I try it, no idea why, it just hangs about 25% of the way through and stays that way until I shut down the computer. It won't update anymore.
Any ideas? What's up with this, and how can I fix it? It's very annoying.