Originally Posted by Chorlton74
every time i open it, it pops up with a new browser page saying i'm the 16th billion person to be a winner of an unknown prize.
any idea how to stop?
Do what Poop said, then if that doesn't work check any extensions you have installed on Chrome (Ad-blockers, cookie blockers) any thing like that? Had a well known ad-blocker for years and one day it started injecting ads into youtube and google.
If you do delete them one by one and see if it fixes the problem (and then reinstall the ones that were OK)