A new computer virus that offers hackers full control of infected PCs, giving them access to critical information such as passwords and credit-card numbers, was spreading on the Internet. The virus, dubbed “BugBear.B” by virus experts, follows two other quickly spreading e-mail viruses seen in recent weeks — “Sobig.B” and “Sobig.C” — but far exceeds them in its ability to do harm and in the aggressiveness of its spread. E-mail filtering services company MessageLabs Inc. had blocked 37,400 copies of BugBear.B from 125 countries by midday Thursday, after barely registering a blip on Wednesday, when the first copies were seen. Full Story