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Free Online Anti Virus Scanning Tools:

You can get a free online anti-malware scan of your computer using nothing more than your web browser. These online scans aren't meant to replace antivirus software and other security software on your computer, but they can supplement them, as well as providing you with quick peace of mind. Here's the 4 most popular online computer virus scanners, complete with descriptions and their URLs to give you instant access to them.

1) HouseCall

Trend Micro's free on-demand scanner identifies and removes unwanted browser plugins, root-kits, viruses, trojans, spyware, and other malware. You can specify which folders to scan, and, after the scan, you can review the results to determine if you'd like to recover any files.

A small download is required to start the scan, but the free program gathers no information that would identify you. You can save a copy of the program, but should visit the website on a regular basis to get the latest version.

The best way to start is to use the Quick Scan option - be sure to enable the Smart Feedback setting to help the rest of the world know what new threats are popping up.

Minimum Hardware Requirements:
  • 300MHz Pentium processor or higher, or equivalent
  • 256MB memory
  • 200MB available disk space
  • 16-bit high-color display with minimum resolution of 1024x768

Operating System Requirements:
  • 32-bit WinXP (Professional or Home edition), with SP2 or SP3
  • Windows Vista - Home Basic/Premium, Business or Ultimate edition, with SP1 or SP2 (both 32-bit and 64-bit)
  • Windows 7 (both 32-bit and 64-bit)

Available at:

2) Symantec

The free online scanner available from Symantec consists of two parts, the first to check the current security status of your computer, the second to scan for malware.

Symantec Security Check is a free scanning tool that performs the following security tests:
  • Hacker Exposure Check (for any unauthorized or unknown Internet communications)
  • Windows Vulnerability Check (for basic info about your computer that might already be exposed to hackers)
  • Trojan Check (for protection against already-installed Trojans that might activate and take over your PC)
  • Antivirus Product Check (for the current anti-virus product protecting your computer)
  • Virus Protection Update Check (for the currency of your anti-virus signatures used by your current product)

Symantec Virus Detection checks for known malware threats, including the most current threats listed in Symantec's databases. You get an analysis, with suggestions for further action. The only restriction is that the tool will not examine any compressed files.

Minimum Requirements:
  • Internet Explorer 5.0+ or higher
  • ActiveX enabled
  • Scripting enabled

Available at:

3) BitDefender

BitDefender's Online Scanner is a free on-demand anti-spyware and anti-virus online tool that makes your computer safe from malware threats. It's accessible right from your own web browser, where it will automatically scan and clean your system's memory, drives, boot sectors, and files. You do not have to uninstall or disable your own data security product already installed on your computer.

Minimum System Requirements:
  • WinXP SP2, Windows 2000, or Vista
  • Internet Explorer 6.0 or later

Available at:


ESET's Online Scanner is a free scanning tool that will remove any malware from any computer. It runs through your computer's web browser, with no need to install any other software. The Online Scanner uses the same signatures and technology and signatures as the ESET products for sale by the company, guaranteeing it's always accurate and up-to-date.

The only restriction is that the signed-on user must have Administrator privileges on the computer to be scanned.

Minimum System Requirements:
  • Windows NT, XP, Vista, or Windows 7
  • Browser can be Internet Explorer 5.0+, Opera, Firefox, Safari, or Netscape
  • ActiveX Controls enabled
  • 32 MB memory
  • 15 MB free disk space (but 30 MB is optimum)

Available at:
Article last updated May 11, 2011.

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