George bought a laptop from someone online and there's a problem with it, and he can't set it up. He bought it on eBay. Leo says it's likely that George doesn't have much recourse here. He simply can't trust that the laptop is safe.
Leo recommends immediately wiping the hard drive and reinstalling Windows. He can't even trust the recovery partition, either. Chances are, reinstalling from the recovery partition will be fine, but he'll never really know for sure. He should completely wipe the drive. eBay should protect him though, and Leo would advise returning it.