As follow up, I called DELL today and worked my way to a Senior Customer Service manager. They guarantee the security of their customers information. The problem apparently is not unknown to Dell, HP and others in the industry. He asked if the person who called had a foreign accent and indeed she did. I was told it’s an international ring quite proficient in hacking personal information. Perhaps it was a cold call as someone suggested and the companies mentioned were random . The industry has been investigating it for a while. The manager I spoke to said he would take my story to his security committee and their outreach resources and keep me informed of any progress. I suggested that his company send their customers a warning. I guess that is all I can do.