Hi,
If you go to the Admin->Servers->Local Site->Site properties. There is a checkbox "Keep a track of all the applications that clients run".
I am sure that the logs of website visits can not be covered in logs. Logs of virus attacks are always logged. If you want, you can run the reports from the reports page to access this information.
if you want specific information, you can go to monitors->logs and then choose the type of logs you want to see.You can export the logs in CSV as well.
Best,
Aniket