If Microsoft’s documentation is correct, installing Patch Tuesday’s KB 3139929 security update for Internet Explorer also installs a new Windows 10 ad-generating routine called KB 3146449.
Many people — present company included — feel that putting an ad generator inside a security patch crosses way over the line. In fact, you have to ask yourself if there are any lines any more.
Microsoft lays it all out in black and white in its inimitable, most obfuscatory way.