I just rebooted my Vista virtual machine that I have Avast on and as soon as the desktop loaded (no browsers started) up popped a box from IE (which I almost never use) asking if I would allow Avast to set an “uta mobile” cookie. What the heck is that?! I said no. I am not on a mobile connection. This is a desktop with wired router.
Seems a rogue… I would scan deeply with avast and MBAM.