Scamsters use private customer details to trick victims into thinking they’re Dell employees. In some cases, the scammers also knew of previous support calls the targets had made. Dell hasn’t responded to questions about the scam. One theory is that Dell PCs came preinstalled with digital certificates that allowed hackers to impersonate any website on the Internet. For the time being, owners of Dell computers should presume their support histories and purchase and contact information has been compromised, Ars says. The theory still doesn’t explain how scammers obtained contact information and support histories.”]