Checking for viruses is usually done with one of those hundreds of softwares that are available for PC, mostly for the Windows OS. And these are big softwares that eat a lot of space once opened for checking at least a single file.
No one would like to have a big load on their computer for checking a single file for viruses. So there are some online tools and websites that would check a file for viruses more easily.
Here are the 3 best tools that can do the virus checking work for you on the web -
VirScan – VirSCAN.org is a FREE on-line scan service, which checks uploaded files for malware, using antivirus engines, indicated in the VirSCAN list. On uploading files you want to be checked, you can see the result of scanning and how dangerous and harmful/harmless for your computer those files are.
This service just checks a particular file which should be lower than 10 MB in size, and every type of virus, trojan, backdoor and spyware is checked for and warned. But it does not protect the whole computer from any malware entering from any warez type of sites.
NoVirusThanks – NoVirusThanks.org offer a free service that scan suspicious files for possible presence of virus, worms, trojans and any other kind of malware using several Anti-Virus engines. This service also uses multiple virus checking softwares and tries to catch hold of the viruses and spyware. And the detailed information about the virus and file scanned are shown to explain the malignancy of the virus.
VirusTotal – VirusTotal is a service that analyzes suspicious files and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware detected by antivirus engines. This service is one of the best and also rated for one of the best tools for 2007 by PCWorld. It does not distribute the scanned file, and the number of virus checking services associated with it are also large.
There are a lot other services to check for viruses, trojans and spyware, but these are the best rated and would be handy to check small files very quickly.

Never knew about them.
awesome tools.
i usually check by sending mail to my other mail as attachment
I like these online services. Good way to double check your files to be certain that they are not infected
Thanks for the info. i have tried in the post checking the files for virus using online services. but it was long time ago.
this is good, I will need it to scan virus on my pc.
very useful article. now a days computer virus is a big problem for computer world…..