Oh boy. A virus?! That ain't good.
Go ahead and download this Totally Legit Mircosoft Support Chat tool so a Security Expert can guide you through fixing it, in a real-time chatroom simulation experience. It's even got chat commands like "/shrug" for when you really just don't get what the heck this Support dude is talking about.
BUG ALERT! Please don't try the /close msdos command until after the story is over, or it'll likely crash the game. :(
Disclaimer: Everything in this game is obviously fiction.