Today in the Internet world computer virus is a big threat which one has to face anytime while using Internet. Virus has many different forms and effect the computer in a way by functioning it undesired way. Many hackers spread the virus on the Internet to get data from the computers when user is online. Malware programs can produce pop-up advertisements, steal passwords and personal information, infect other computers on your network or transmit information about the web activities of computer users.
It is almost impossible to stop virus to spread over the Internet. There is lots of software available in the market today to protect against these unwanted malwares and virus. It is also essential that you know about these malwares precisely and how they can harm your computer before buying an anti-virus and malware protection software.
Viruses:
There are many harmful viruses and they replicate themselves instantly and spread easily to other computers. Some of the effects are listed below that a virus can produce on your system:
- Delete files and reformat the hard disk
- Consume excessive computer memory
- Overwrite other programs with copies of themselves, destroying the host program.
- It can transfer the software or document with the virus from one computer to another via email attachment, disk, network or file sharing enables it to spread.
Worms:
Worms are the same program as the virus but there is some minor change in these two. Worms are standalone programs and effect the system configuration. They make some changes that produce automatic execution of the some programs.
Trojans:
Trojans are the most dangerous malware. It is mostly not recognized by the malware protection software as they are attached with the mail or with the executable file and it spreads when user click on that. Trojan produce effects like sudden change in desktop, file deleted automatically, pop up window, data theft is also a major concern with that, make malicious software to access your system easily by damaging security.
Spyware:
The spyware will spy on your activities. All it does is gathers and transmits the information without your knowledge about your web browsing and computing, such as websites visited, browser software, computer IP address and system information.
Adware:
Adware not spy on your computer though some do it typically displays ads, particularly pop-up advertisements.
Stealware:
This will overwrite the marketing codes which are essential for the businesses. It redirects the revenue of the business to the stealware creator instead of to the affiliate who actually earned revenue.
Rootkits:
Root kits make the malware files hidden from the system by modifying the system settings. They make the malware program processes hidden also from the list of system processes.
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