Free Online Virus Scan

Free Virus Online Scan - What To Look For In Antivirus Software

2008-06-05T09:39:00.000-07:00

Features and Functions Your AV Software Should Have

With up to 100 new malware threats being discovered per day, antivirus software is, for many home computer users, the primary method for protecting their computer from threats.

Many computers come with some sort of antivirus software, often a trial version, installed. Unfortunately, many users fail to properly configure the antivirus software or keep it up to date, and many may let the antivirus software expire without even realizing their computer is no longer protected against current malware threats.

This article provides a listing of some of the key features or functions that are commonly found in antivirus software. Becoming familiar with these terms and their uses will help you get the most out of your existing antivirus software program, or help you find for new antivirus software.

# Realtime Scanner: The antivirus software realtime scanner monitors network data as it is coming into the computer to intercept any malware as it enters your system.

# On-access Scanner: The on-access scanner does what its name implies- it scans files as they are opened or accessed to detect any malware.

# On-Demand Scanner:The on-demand scanner provides the ability to perform a custom scan of a file, folder or drive initiated by the user.

# Heuristic Scanner: Antivirus software typically has a heuristic scanner as well. Heuristic scanning uses what is known about existing malware and what it has learned from past experience to identify new threats even before the antivirus vendor creates an update to detect it.

# Compressed File Scanner: Some malware may come inside a compressed file such as a ZIP file, or may even be embedded in a compressed file within a compressed file and so on. Most antivirus programs can scan within a compressed file. The better programs may be able to scan many levels deep to detect malware even if it is buried within multiple compressed files.

# Scheduled Scans: Most antivirus software provides some method of creating a schedule to set when the software will automatically perform a scan. Some antivirus programs may restrict what sort of scans can be scheduled, while the more flexible programs allow you to run any type of pre-configured or custom scan at the scheduled time.

# Script Blocking: Script languages are frequently used to execute malicious code from web sites. Many antivirus programs have the ability to monitor Java, ActiveX, Visual Basic and other script files and detect and block malicious activity.

# POP3 Email Scanning: The ability of the antivirus software to monitor incoming and/or outgoing POP3 email traffic and the associated file attachments to detect and alert about virus or other malware threats.

# Webmail Protection: The better antivirus programs can monitor web-based email traffic such as Hotmail or Yahoo! Mail to detect and block malware in file attachments.

# Instant Messaging Protection: Many worms and other malware can now be spread through instant messaging programs such as AOL Instant Messenger (AIM) or Yahoo! Messenger. Some antivirus software will monitor instant messaging traffic to detect and block malicious threats.

# Automatic Virus Updates: One of the biggest problems users have with antivirus software is simply keeping it up to date. Most antivirus software can be configured to automatically connect with the vendor site and download new updates on a regular basis.

# Automatic Program Updates: The scan engine(s) and program itself may periodically be updated to add functionality to detect newer threats. Many antivirus software programs can be configured to automatically check for new updates and downlaod and install them if they are available.

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Free Online Virus Scan - Free Encrypted Email, Free Encrypted Chat

2008-06-02T07:42:00.000-07:00

E-mail encrypted allows you to protect your e-mails confidential casual prying when you communicate with others. Cryptée cat does the same thing when you go online to chat. Grosso modo, works by encrypting your message in plain text and blur the exit so it is incomprehensible to someone who sees no decryption. To read it, the recipient must decipher the message using a password (or key). For the purposes of communication, people generally use the so-called public-key encryption made famous by the commercial PGP (software encryption of e-mail). However, since everyone does things differently, you will have to check the various free services and software you mentioned here to find out how they implement it.

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Free Online Virus Scan - Free HIPS (Host Intrusion Prevention System)

2008-06-02T07:38:00.000-07:00

Software which implement HIPS, Intrustion host or prevention system, you can control all applications, drivers, shared libraries (DLL), and other activities that occur on your system. For example, under Windows, HIPS software often check whether the programs are loaded (whether in the foreground or invisible, behind your back, background), where drivers are being installed or loaded by Programs, when global hooks or keyboard hooks are inserted in your system, when the code is injected into another process (ie running program) by another program, etc. Some of they allow you to prevent such programs operate and also let you kill (end) all programmes May already be running. They May be useful, for example, to help you detect when a rootkit, keylogger, spyware or trojan is being installed in your system. These host-based prevention systems or application and control software systems often work alongside your personal firewall (for the network or Internet), antivirus software and anti-spyware and anti-malware tools.

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Free Online Virus Scan - Free Spyware/Adware/Trojans/Hijackers/Dialers/Keyloggers Removal

2008-06-02T07:33:00.000-07:00

If you had programs unexpectedly installation on your system, popping up advertisements, said the voice advertisements or playing music, evolution (diversion) your home page (or start page) , Which amends the results of your search, display of search results when you click on a file 404, please visit, composition, and so forth, your system has probably been compromised by some spyware, adware , Trojans, hijacker or calls.

Broadly speaking, when this page refers to spyware, it means some program that was installed on your system that reports something back to the software author (or website that installed) - whether Web sites you visit or your activities on the computer or so. Adware, a program that displays advertisements on your computer, and I am not saying usual advertisements you see on the web pages you visit: adware pop-up windows advertising (or, in some cases, say a voice message ) On your system are not generated by the websites you happen to visit. Dialers are programs that are installed on your system and try to line up a telephone line somewhere, sometimes you incurring expensive phone bills. Keyloggers record the keys you type on your computer (some are more sophisticated in the screenshot, etc.), and either sign or signal to the person who installed.

This page lists some sites and software you can use to detect such spyware, adware, Trojans, hijackers, dialers, keyloggers and what-have-you on your computer. Some will also delete, and others, when installed and run will prevent some of these dirt to be installed in the first place.

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Free Online Virus Scan - Firewall Test

2008-06-02T07:22:00.000-07:00

If you're new to computer security, then Firewall this test is for you. This test will check your computer for the ports are generally left open. Open ports could allow your computer to be compromised. This firewall test also checks for open ports known to be used by viruses and Trojan horses.

If you are the type home computer users surf the net, you should not find either of the ports. If you find open ports, we'll show you how to lock your system.

Advanced Firewall test

The firewall test you will select a range of ports (or a specific port) scanning. It is useful for testing the services of Remote Desktop, FTP servers and other services running on non-standard ports.

Network administrators who seek to test the ports hidden find this test firewall very useful. It eliminates the need to set up a server or outside computer to perform safety audits and can reveal the ports do not seem to be open.

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Free Online Virus Scan Now!

2008-06-01T11:29:00.000-07:00

Looking for a free virus scan? Look no more!

I realized a number of tests using viruses that have been sent to my e-mail, I took attachments (virus), placed on an old computer I was sitting around d '(ensuring not to unpack or executed), and most visited online anti-virus sites on the net.

Some sites have a free virus scan, but it was disabled, as scanning for viruses, but not let you delete the virus without buying their software first. In fact, some of these sites you want to shop even if I had a virus on my computer! Like anyone is going to give credit card information on the Web when it could save a virus looking background!

The virus scan online

If a site drawn cascades like this, so I excluded from the list of sites that offer free virus scan, if what you see below is just quality companies. Many times, a site can find most, but not all viruses while Anti-virus site can find other viruses missed, but the absence of some than others found.

I know, sounds confusing, what you should do - select three sites and scan your computer with viruses for each. By using more of a free virus scan, you will greatly increase the chances of finding the most delicate.

Note: I had to rework this anti-virus free list for legal reasons and should return soon!

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Free Online Virus Scan - What Is Virus

2008-06-01T11:20:00.000-07:00

In computers, a virus is a program or programming code that replicates by being copied or initiating its copying to another program, computer boot sector or document. Viruses can be transmitted as attachments to an e-mail note or in a downloaded file, or be present on a diskette or CD. The immediate source of the e-mail note, downloaded file, or diskette you've received is usually unaware that it contains a virus. Some viruses wreak their effect as soon as their code is executed; other viruses lie dormant until circumstances cause their code to be executed by the computer. Some viruses are benign or playful in intent and effect ("Happy Birthday, Ludwig!") and some can be quite harmful, erasing data or causing your hard disk to require reformatting. A virus that replicates itself by resending itself as an e-mail attachment or as part of a network message is known as a worm.

Generally, there are three main classes of viruses:

File infectors. Some file infector viruses attach themselves to program files, usually selected .COM or .EXE files. Some can infect any program for which execution is requested, including .SYS, .OVL, .PRG, and .MNU files. When the program is loaded, the virus is loaded as well. Other file infector viruses arrive as wholly-contained programs or scripts sent as an attachment to an e-mail note.

System or boot-record infectors. These viruses infect executable code found in certain system areas on a disk. They attach to the DOS boot sector on diskettes or the Master Boot Record on hard disks. A typical scenario (familiar to the author) is to receive a diskette from an innocent source that contains a boot disk virus. When your operating system is running, files on the diskette can be read without triggering the boot disk virus. However, if you leave the diskette in the drive, and then turn the computer off or reload the operating system, the computer will look first in your A drive, find the diskette with its boot disk virus, load it, and make it temporarily impossible to use your hard disk. (Allow several days for recovery.) This is why you should make sure you have a bootable floppy.

Macro viruses. These are among the most common viruses, and they tend to do the least damage. Macro viruses infect your Microsoft Word application and typically insert unwanted words or phrases.

The best protection against a virus is to know the origin of each program or file you load into your computer or open from your e-mail program. Since this is difficult, you can buy anti-virus software that can screen e-mail attachments and also check all of your files periodically and remove any viruses that are found. From time to time, you may get an e-mail message warning of a new virus. Unless the warning is from a source you recognize, chances are good that the warning is a virus hoax.

The computer virus, of course, gets its name from the biological virus. The word itself comes from a Latin word meaning slimy liquid or poison.

Article Source : http://searchsecurity.techtarget.com/sDefinition

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