WTF? all careers erased.

[Igo kyu]

When I started my computer today, there was something odd going on, some sort of scan or something, before windows got started, I didn't know what it was but thought it could have been an update of something.

Tonight, I put the 1946 disk in, go to play and all of my pilot careers are erased.

What's that about?

If my game was a pirate copy, which it is not, they'd be within their rights to delete the entire thing, but I don't see the point of deleting my games in progress and leaving the game installed.

I have anti-virus, and Windows Defender runs nightly as it likes. Is this a known infestation, or is it Ubisoft playing silly billies?