If you are unsure about a particular file you just downloaded or if you see anything bizarre in your hard disk, it is prudent to be tested by several viruses. Therefore, you can now analyze online for any virus into your machine by following the below method:

Click on this link: http://www.virustotal.com/
Click on Browse ...
Select the file you want to analyze and click Open
Then click Upload File:
We must wait for the analysis of the file by the antivirus. You interpret the results. If you do not do it, you can ask on the Viruses / security forum by giving the address (link) from the analysis.