I'm having the same problem, every 30 seconnds, even without launchine IE, svadxvbtuc8c.com appears in my avast poppup. i have two machines running win7, this one is on win7pro. the win7home machine i use for gaming is unaffected both are wire connected to the router.
Its been going on for at least 24 hours. i'm rather shocked that avast doesn't log the file that is sending the url request.
I don't have a restore point so i'm currently backing up essential files to onedrive and prepping for a wipe and reinstallation of win7.
I'd love to hear if someone comes up with a solution to this issue.
malwarebytes and windows defender aren't finding the culprit though both did turn up some possible viruses/spyware which i promptly removed.
Interesting side note, i primarily use opera for browsing. the only things i use IE for are direct links to netflix amazon prime and pbskids. odd that the infection would occur at IE in my opinion.
i've done boot scans through avast as well as deep scans.
I'm afraid to drop my anti-virus to install combofix because if avast is blocking this connection, i'm pretty sure it'll succeed if i take avast down.