3
I configured the program to automatically run a [b]full virus scan, each night[/b]
There is no need for this frequent scan

All AV (with one exception) have realtime protection/monitoring, meaning evrything that goes on in your computer when it is on is checked/scanned by your antivirus in realtime

[b]Real-time protection[/b] Real-time protection, on-access scanning, background guard, resident shield, autoprotect, and other synonyms refer to the automatic protection provided by most antivirus, anti-spyware, and other anti-malware programs. This monitors computer systems for suspicious activity such as computer viruses, spyware, adware, and other malicious objects in 'real-time', in other words while data loaded into the computer's active memory: when inserting a CD, opening an email, or browsing the web, or when a file already on the computer is opened or executed