20+ Free Online Malware Scanning Services

How to prevent malware infection from a computer without any antivirus protection? Here are the 20+ online malware scanning services to reduce the risk from the online threats.

Scan suspicious file by using multiple antivirus engines

Analyzes suspicious files and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware detected by antivirus engines.
URL: http://www.virustotal.com

Online scanning suspicious files using several antivirus engines. And you can find the result and the degree of suspicious files.
URL: http://www.virscan.org

Online virus scan suspicious files (which *could* contain a computer virus) using several antivirus engines.
URL: http://www.viruschief.com

Jotti's Malware Scan
Utilizing various anti-virus programs to diagnose single files.
URL: http://virusscan.jotti.org

Virus.Org Rogue File Scanning Service
Scans uploaded files with several common Anti-Virus tools to attempt to determine if the uploaded file is in fact some form of Malware.
URL: http://scanner.virus.org

Check the web link before you proceed

Test the Web to help keep you safe from spyware, spam, viruses and online scams
URL: http://www.siteadvisor.com

Helps you avoid Web pages with unwanted content and hidden threats.
URL: http://www.trendsecure.com/portal/en-US/free_security_tools/trendprotect.php

Scan each and every one of your search results to see if there is anything malicious behind the links and then feed the security results back into your search page.
URL: http://www.scandoo.com

Dr.Web Link Checkers
Scan for viruses and all kinds of malicious programs any web link before it is opened, or any file before it is downloaded onto your computer
URL: http://www.freedrweb.com/browser

Inspect it in real-time for whether it is hiding any exploit code and, if so, what exploit.

Finjan SecureBrowsing
Provides you with safety ratings of URLs showing in your browser
URL: http://securebrowsing.finjan.com

Scan your computer with Online Antivirus

Detects virus, spyware, Trojans and other types of malware in about 1 minute.

Kaspersky Online Scanner
Scan your computer for malicious code and offers the same exceptional detection rates as other Kaspersky Lab products.
URL: http://www.kaspersky.com/kos/eng/partner/default/kavwebscan.html

BitDefender Online Scanner
It features all required elements for thorough antivirus scanning and effective cleaning.

Trend Micro HouseCall
Checking whether your computer has been infected by viruses, spyware, or other malware.
URL: http://housecall.trendmicro.com

ESET Online Scanner
Remove malware from any PC utilizing only your web browser
URL: http://www.eset.eu/online-scanner

F-Secure Online Scanner
Find out if your computer is infected and disinfect your computer if needed.
URL: http://support.f-secure.com/enu/home/ols.shtml

McAfee FreeScan
Helps you detect thousands of viruses on your computer
URL: http://us.mcafee.com/root/mfs/default.asp

Panda ActiveScan
Combat viruses, spyware and other Internet threats
URL: http://www.pandasecurity.com/homeusers/solutions/activescan

Windows Live OneCare Safety Scanner
Designed to help ensure the health of your PC.
URL: http://onecare.live.com/site/en-us/default.htm

Symantec Security Check
Tests your exposure to a wide range of online threats.
URL: http://security.symantec.com