What are some of the symptoms of virus infection?
There are viruses which don’t “care” if you notice them or not if your computer is infected with one of them.They usually display messages on the screen,show graphics or play sounds which makes them easily detectable.Others don’t want to show you their presence but it’s possible to see them too.You have to watch for any unusual activities like increase of the time for executing programs,excessive disk access while performing simple tasks,decrease of system resources,strange appearance and disappearance of files,changes in file sizes,corruption of files,and others.You have to watch also for open ports which are not used by any of your programs.If you find such port,it’s possible that your computer has been infected by a trojan.Watch for one ore more of these symptoms and everything other that seems strange to you.If you really think your computer is infected,you can get an antivirus program to scan it or you can use an online virus scanner.However,I still think that it’s much better to