Computer viruses do not exist naturally. They are a set of instructions or program codes compiled by some people to take advantage of the inherent vulnerabilities of computer software and hardware.
It can lurk in the storage medium (or program) of the computer through some means, and will be activated when certain conditions are reached. The method of modifying other programs puts exact copies or possible evolved forms of itself into other programs, thereby infecting other programs and damaging computer resources, which is very harmful to the infected users. (Recommended study:PHP video tutorial)
Usually virus programs are hidden in system files, but it depends on the main attack trend and purpose of the virus.
Formatting is comprehensive
1. After the computer has been running for a period of time, the disk utilization efficiency will be affected by the garbage/fragments inside. Decline, this situation cannot be solved by deletion
2. In addition, some stubborn files (such as certain viruses) will remain in the system and cannot be deleted even if you reinstall the system
3.............
So at this time we need to put the disk on To clean up everything cleanly, you need to format the disk
Formatting refers to an operation of initializing a disk or a partition in a disk. This This operation usually results in the erasure of all files on the existing disk or partition.
Formatting is usually divided into low-level formatting and high-level formatting. Unless otherwise specified, formatting a hard drive usually refers to advanced formatting, while formatting a floppy disk usually includes both.
Disk formatting (Format) is an operation process of writing zeros in all data areas of the physical drive (disk). Formatting is a purely physical operation. At the same time, the consistency of the hard disk media is checked and marked. out unreadable and bad sectors. Since most hard drives have been formatted at the factory, formatting is only required when an error occurs in the hard drive media.
There are two types of formatting. The first is to format the system disk (default is C drive). After the computer is turned on normally and enters the operating system, the system disk cannot be formatted. It can only be formatted. Choose whether to format during the installation of the operating system.
The second is to format the non-system disk (default is D drive, E drive, etc.). After entering the operating system, just right-click on the disk letter and select format. After completion, The contents of the disk are lost and cannot be restored.
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