1.Of the parasitic way into the boot-type computer virus file virus and compound-type virus
The boot virus is parasitic in the disk boot sector or master boot sector computer virus. The virus system boot, the Lord does not guide the contents of the area to the correctness of the shortcomings of discrimination in the process that led system into the system memory-resident monitoring system is running standby transmission and destruction. Can be subdivided in accordance with the location of boot virus parasitic on the hard disk master boot record viruses and partition boot record virus. The master boot record virus infected hard disk master boot sector, such as cannabis virus 2708 virus, torch virus, etc.; active partition boot record, partition boot record virus infected hard disk, such as small ball viruses, Girl, virus.
Archive for the ‘Computer history’ Category
1.Of the parasitic way into the boot-type computer virus file virus and compound-type virus
What Was The ENIAC?
ENIAC was the world's first computer.The ENIAC contained 17,468 vacuum tubes, along with 10,000 capacitors, 70,000 resistors,1,500 relays, 6,000 manual switches and 5 million soldered joints. It covered 1800 square feet (167 square meters) of floor space, weighed 30 tons, consumed 160 kilowatts of electrical power. There was even a rumor that when turned on the ENIAC caused the city of Philadelphia to experience brownouts, however, this was first reported incorrectly by the Philadelphia Bulletin in 1946 and since then has become an urban myth.
Ghost software is the symantec offering a good hard disk backups reduction tools, can realize FAT16, FAT32, NTFS, OS2 and so on many kinds of hard disk partition division and the format of the hard drive of backup reduction.
Features: Ghost backup reduction is the hard drive for the sector units, that will be a hard drive in the physical information complete copy, and not just a simple copy of data; Human cloning clone body only, but the Ghost but it can clone system all things, including voice animation image, even the disk fragment can help you copy. Ghost division or hard drive support will directly backup into an expansion called. Gho file (image files), also support directly to another backup division or hard disk. Read more
Mobile cloud computing is the usage of cloud computing in combination with mobile device. Cloud computing exists when tasks and data are kept on the internet rather than on individual devices, providing on-demand access.
Applications are run on a remote server and then sent to the users. Because of the advanced improvement in mobile browsers thanks to Apple and Google over the past couple of years, nearly every mobile should have a suitable browser. This means developers will have a much wider market and they can bypass the restrictions created by mobile operating systems. Read more
What is the Bootable Floppy?
Many people do not know what is the bootable floppy, it is very simple.The bootable floppy is the diskette contained a back-up copy of your hard disk master boot record (MBR). When the master boot record becomes "infected" by the boot virus, if having a bootable floppy will allow you to load it back onto your hard disk. Otherwise, you must have to reformat your harddisk which first erases everything on the disk including files you may not have a backup copy of. Even if you do that will mean you need to restore everything you've backed up, it will lost much time to complete.
If you want to make a dos bootable floppy ,you should read this post:How to Make a Dos Bootable Floppy?
What is the world's first computer?Somebody does not kown the first computer who designed.Now let us introduce the world's first computer.
February 14, 1946, the world's first computer ENIAC (Electronic Numerical Integrator And Calculator) was born at the University of Pennsylvania . During World War II, the U.S. military asked the University of Pennsylvania Ph.D. Mauchly and his Students Eckert ot design to replace the vacuum tube relay "electronic" computer - ENIAC (Electronic Numerical Integrator and Calculator), Electronic Numerical Integrator and Total Calculator). Read more
the First Computer Virus and the Most Powerful Virus in History?
A computer virus is a computer program that can replicate itself and spread from one computer to another. The term "virus" is also commonly, but erroneously used, to refer to other types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability.Viruses can increase their chances of spreading to other computers by infecting files on a network file system or a file system that is accessed by other computers. Read more
What is the difference between BIOS and CMOS
In the daily operation and maintenance of computer process, often hear a number of statements about the BIOS settings and CMOS settings , many people often confuse the BIOS and CMOS. This article describes the CMOS settings and BIOS settings of distinction between the basic concepts and linkages.
What is BIOS?
The BIOS, is actually a computer's Basic Input-Output System, its content integrated in the computer a ROM chip on the motherboard, the main computer system holds the most important basic input and output procedures, system information set , turn the power on self test procedures and systems bootstrap procedures.
Function of the BIOS
BIOS ROM chip can not only see on the motherboard, and the BIOS management board to a large extent determines whether the performance is superior. BIOS management features include:
1. BIOS interrupt service routine
BIOS interrupt service routine is essentially a programmable interface between the hardware and software in the computer system, mainly used a interface between hardware and software . For example, DOS and Windows operating system on floppy disks, hard drives, optical drives, keyboards, monitors and other peripheral equipment management, are built directly into the system BIOS interrupt service routine basis, and the operator can also access the INT 5, INT 13 other breakpoints directly to call BIOS interrupt service routine.
2.BIOS system setup
Computer components configuration records are placed in the CMOSchip, mainly preserved in the basic situation of the system, CPU features, soft and hard drives, monitors, keyboards and other parts of the information. In the BIOS ROM chip with "System Setup", mainly used to set the parameters of the CMOS RAM. This program in boot time by pressing a particular key enter setup mode, and provides a good interface for the operator to use. In fact, this set the CMOS process parameters also called "BIOS settings." Once the CMOS RAM chip on the computer configuration information is incorrect, the light will make the system to reduce the overall operating performance, soft and hard drives and other components can not be identified, which will lead to a serious system hardware and software failures.
3. POST Power On Self Test
Computer power on, the system first by POST (Power On Self Test) procedure to check each device on the internal. Usually complete POST will include the CPU, 640K base memory, 1M or more extended memory, ROM, motherboard, CMOS memory, serial and parallel, video card, keyboard, harddisk subsystems for testing, once the self-test problems are detected, the system will give a message or a warning whistle.
4. BIOS boot bootloader
After system completed POST, ROM BIOS on the first follow the system CMOS settings stored in the boot sequence search for soft and hard drives and CD-ROM, network servers effectively boot drive, read into the operating system boot record, then gives the system control to the boot record,and lets boot record to complete the system by a smooth start.
Windows 8 with a new startup and shutdown mode, set the traditional cold start and recovery sleep in one, you can achieve "instant boot." In Windows 8, will dialogue system kernel into hibernation, to go into hibernation file hiberfil.sys. Traditional sense completely dormant application will contain a large number of memory pages, the default memory size is 75%, but Windows 8 in the Session 0 hibernation file only save the system state and memory contents, memory capacity, so the volume is only about 10 - Read more
Commemorate the tenth anniversary of Windows XP!The History of Changes in Windows Start Menu
From the first date truly meaningful graphical interface, Windows has been with us for more than ten years . As nature's evolutionary history, as it is for us to show the computer as a platform for personal information changes. In this huge software, and accompany us most is probably that the "Start" buttons. As a my colleague said , as a computer user, this button is probably the most should be forgotten. At the same time, as IT people, but it's changes is the most should not be forgotten, because it is the history of the operating system serviced human.
Year: 1995 Read more
1.90s document management and sharing
In the course of development of Windows, file management has been run through, it's hard to lose after the Windows file manager can do? In fact ever since the day the birth of Windows, Microsoft has wasted with its perfect, if you link up with the results of these years, you will discover that change is really huge.
1. Windows 95
If you take the vision to see the then current Win95, you must be feeling a long time, "God! This is who I exhilaration of Win95?". Yes! There is no compelling appearance, not the directory tree, not a single window into the style, no-input the address bar, which is Win95, a God who is the same as that for the operating system. If I have traced, then the toolbar also some little shadow of a modern operating system. Indeed, so old!
Of course, file search, or some, or how to find necessary documents? But speed is not too much to wish for! Fortunately, the hard drive was very small, slowly can endure!
And an unexpected finding is that file sharing actually have in the subsequent 16 years has not changed much, Win95 sharing model pioneered in the Win7 now be used in the same, but only slightly enhanced functionality (such as shared access). Seems to Win95 had indeed created a lot of precedent.
In view of the window is not hand-Win95, Win98 began to significantly improve this feature. Address bar is one of the most obvious one change, the user can manually enter the address for the first time to quickly jump position, and with new "forward" and "back" and more quickly move between directories became smoothly together. Read more