we have one PC with sensitive data files. Only one admistrator is using this PC. The PC is not connected to an internal network. However it is connected to the internet for web browsing and email access. The question is how we can prevent outside hackers get access to the PC and to steal the sensitive data files.
We use the Avira Premium Security Suite for antivirus, malware and firewall. But I don't know if this gives me a high security standard.
What else can be done to have a professional, highly secure environment?