The e-mail was very specific, beginning with the subject line. Warning!! Don't Use [Product-X]'s New Upgrade -- High Risk of Data Loss!! Inside, the warning text alerted me that the latest “upgrade” for a certain vendor's software product was very flawed. Using it would put your existing notebook data at risk of contamination. Unfortunately, there were two aspects of the message that I found very troubling. The first was that it came too late -- I'd already installed the upgrade and had indeed lost data because of using it. The second was that the e-mail didn't come from the manufacturer.