computer virus
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infrequently. Some slow infectors, for instance, only infect files when they are copied. Slow infectors are designed to avoid detection by limiting their actions: they are less likely to slow down a computer noticeably and will, at most, infrequently trigger anti-virus software that detects suspicious behavior by programs. The slow infector approach, however, does not seem very successful.
Vectors and hosts
Viruses have targeted various types of transmission media or hosts. This list is not exhaustive:
Binary executable files (such as COM files and EXE files in MS-DOS, Portable Executable files in Microsoft Windows, and ELF files in Linux) Volume Boot Records of floppy disks and hard disk partitions The master boot record (MBR) of a hard disk General-purpose script files (such as batch files in MS-DOS and Microsoft Windows, VBScript files, and shell script files
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