Anti-Virus check list

My check list would look something like this:

• Real time protection (actively scans your running files)
• Manual scans (can choose folders to scan, useful for newly downloaded files)
• Updates (if your looking for freeware make sure it isn't shareware by requiring to buy the pro version to update definitions.)
• High detection rate
• Low system resources usage
• Auto-update (if your lazy)
• Boot scans (if you don't mind the extra boot up time)
• Password protected or not easily closed by other programs or viruses.