for example i will create a virus today, are they going to know it? This is only an example.
Answers:
They don't know ahead of time, here service is after a vius is submitted they find the cure and after you download the fix.
Many belive that adjectives Trojans, Viruses, and Malware are contained by reality developed and relesed by these same Antivirus Companys, as a startle tactic to hang on to the money flowing.
Thus forcing users to hold on to buying protection
Don
virus's are detected by the coding used to create them, they use strings of coding which are adjectives equal basicaly, most anti virus's own this gift to detect them, when its be detected it get relayed spinal column to the softwares creaters and they label a update to include the string for the adjectives, this make sure nobody else get it
Each and every time your anti-virus connects to the internet, be it for update purposes or checking the database containing information on respectively type of virus, it asks it's respective connected servers for updates on trial threats. These servers analyze hundreds of thousands of page of the internet every daylight and dark inquiring for those unkind codes out in that hell bent on destroying computers. When the server finds these codes it logs an entry stating the make-up, baptize of, and rough estimate of capability that respectively virus contains. So your software read this notes and make the mandatory updates and adjustment to protect your system. Or something resembling that lol.
Security companies and anti-virus/anti-spyware manufacturer habitually use 'honeypots' or unprotected machines on which to land information give or take a few warranty threats and/or virus. Additionally, they adopt submissions from users next to unknown or strange virus surrounded by command to study them.