![]() ![]() Resident viruses are the primary type of direct-acting viruses, which are completely incompatible with non-resident viruses, and the names interpret themselves. This type of virus is installed on the computer and stored in memory, which means that the virus starts to work every time the computer is turned on. Even after eliminating the original source from which you infiltrated your device. As such, it is considered one of the most dangerous types of computer viruses. Rugrat is one of the early discoveries of non-resident viruses known as Win64.Rugrat, the first virus to infect Intel Itanium-based computers. What the virus was doing was trying to infect all executable (exe extensions) that support 64-bit architecture and destroy them and the rest of the files in the same folder Third: Viruses resident in the system Second: Direct-acting virusesĭirect-acting viruses are divided into two main types: resident viruses and non-resident viruses. The latter does not install itself on the computer and does not remain hidden in memory - it works by selecting one or more folders - and infecting the computer every time this folder is opened, so that when certain conditions are met, All the files in this folder. Fortunately, this virus does not delete anything or affect the performance of your computer. But what happens after the injury is the damage of some files, and you can easily remove this virus by any simple anti-virus program. This virus spreads to removable storage media such as the USB flash memory. It began to emerge widely in the 1990s when floppy disks were dominant in storing data on computers. But you can still find them now and via e-mail attachments. But it will often have no impact on modern computers thanks to improvements in the BOIS architecture, which has reduced its spread. ![]() This virus is capable of infecting the computer and paralyzing it completely only in case it was booting before the operating system. In other cases, the virus is released after or when the computer is turned on, so the user will still be able to continue working on the device. Because the virus destroys the boot program on the hard drive, it is difficult to get rid of it and often you will need to do a full format. A portable storage unit such as hard drives, floppy drives, flash drives and sometimes CD / DVD discs, has an essential part called Boot Sector. Without this part, it is impossible for the computer to load and boot the operating system. Therefore, the boot sector virus is one of the most dangerous types of computer viruses. The virus usually replaces the default boot program with a special and corrupted version. ![]()
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