[joshchaney]

The title should really be changed, there is no confirmation they were hacked. I have an equally plausible theory -- You used the same username and password somewhere else that got hacked, or your credentials were stolen through some infostealing malware. Account takeover is a huge problem these days, it wouldn't surprise me if there is a tool out there written specifically to validate combo lists against Dell's website.

[Bhullnatik]

He mentions using two-step verification though. That doesn't mean it's not possible, but that makes a lot harder to get into his account.

[joshchaney]

He said his email account has 2FA (convincing us his email was not hacked), I don't think he meant his account on Dell.