(TNS) — Up-to-date software, user training and vigilance are the best defenses against computer viruses and cyberthreats like the one that crippled the Luzerne County Courthouse’s computer network. Luzerne County joined a growing list of governments victimized by cybercriminals when officials discovered late last month that a virus infected some computers in the county’s system. Luzerne County information technology professionals and outside computer security consultants have spent the time since rebuilding the network, and hope to have it fully restored this week. A forensic investigation into how the Luzerne County computers were infected begins soon, but officials suspect someone connected to the network opened an attachment to a fraudulent email that contained a virus. Among other tips, Mando warned users to treat email cautiously, never open an email unless 100% certain it’s legitimate, verify the sender’s email address and not just the name that appears, and inform IT professionals of anything that appears suspicious.