Right, I'm throwing this out to the masses because I'm at my wits end.
My wife runs an ebay based shop and she's had a week of hell due to people of dubious parentage hacking into her accounts. I have absolutely no idea how they're managing to get in. Both accounts have strong passwords (random letters/numbers) and we're even using random letters and numbers for the security questions to stop people guessing those. I've run Microsoft Security Essentials over the computer several times, and nothing has popped up and also Malwarebytes whatnot which again reports nothing amiss.
So far this has happened 5 times in as many days and once they get access to the account they go on a rampage selling iPhones. So far they've run up a bill totalling £500. Ebay themselves are next to useless, however they've agreed to refund the money and have sorted the feedback/sales but they say that there's nothing else they can do to secure the account. Hotmail appears to be the same, no matter what I do with passwords etc they still manage to get in.
So - I'm guessing the computer is being compromised in some way. It's running Win7, fully up to date. Any suggestions?