When was the last time that you checked your Task Manager for potentially dangerous files? I’ll admit that I don’t do it all that often because I put a lot of faith in my antivirus software, but I have been known to Google apps that I don’t recognize. I’m sure you’ve done your fair share of Googling filenames, right?
Today I finally decided that there had to be a good site out there that I could use to lookup unknown files, in particular I wanted something that wasn’t popup infested! I went through dozens of sites before I came across WhatIsThatFile.com. It has a somewhat slick interface that shows matching filenames as you type in the search box. It will highlight files that are potentially dangerous, such as a virus or malware, and give a brief description of each. It will even let you know if an application is a prime target for infections, such as Internet Explorer (iexplore.exe).
Right now it is home to information on over 3,000 files, which is a rather large selection. Anyone can edit the information for a particular file, or add a file themselves, but they are subject to the approval of the admin. In a way this is like the Wikipedia of filenames!
Let us know in the comments below where you go to lookup unknown files on your computer!

Here are some of the ones I use, though Google is a great resource in this area too.
[processlibrary.com]
[file.net]
[process.networktechs.com]
Quickest way for me has always been GOOGLE search.
From results, you directly go to solution, often at
[fileExt.com], or file.net, but there’s indeed such a lot they can’t be quoted. For processes explicitly, leland wrote above.
GOOGLE advantage, let’s say i.e “ccApp”, first result will of course be Symantec at first glance. So, I say google.
Speaking of Google, who once said Google docs etc…didn´t work in Opera?
Very good site indeed. nice use of ajax
The first one is pretty nice, but I’m not big fan on the search capabilities of the second two.
There are some workarounds to get Google Docs working good in Opera, but not everything will work.
Oh.. great site, Search-as-you-type is definitely kick-ass.
@Ryan,
Without not to much workaround, I can assure you I’ve got no problems with Google “screens” let’s say. Since iGoogle diplay has been completely fixed with Op.browser. May be also, I tend not to use Google docs and other apps very often.
Have you tried last Markus O. (op@usb) 9.5beta release? I think he did a great job for the portability of a browser. Even cache can be set on thumb drive without altering speed if the thumb has a good read/write average.
Other,from “Destkop team” here, Opera mini is nice! With a good Google integration! And both communities are really worthy.
See you back soon! Going to SK for job! Just so happy
that website just sucks, it doesn’t do ANYTHING, just sits there looking stupid at you while you type.