Viruses are computer programs which have speciality to bedaub its own codes to another programs. They generally debouch very fast to computers which they bedaubed. They are not usually bad , sometimes they can be enjoyable.
Truva horses has a rather different structure from viruses. They don’t ever smudge to another programs.Because they don’t copy themselves, They are put consciousness to some programs. Trojans are fixed onto the programs like utility.
There are 3 types of viruses :
1- Disc viruses: a-boot b- MBR
2- File viruses : a-program (TSR ve non TSR ) b- Macro viruses
3- FlashBIOS viruses
