TrojanDownloader:Java/OpenConnection.IJ is a computer threat which can cause your computer to suffer from various pieces of malware contamination. This Trojan is able to access a remote website and then download and install malicious and potentially unwanted software to your computer. It can also target certain files on the websites, or a specific internet address, which would then lead to a website containing a code. That code allows the site to automatically download malicious software to your computer. In other words, this Trojan allows other threats to root into your system, and therefore it must be killed as soon as possible.
Trojan infections spread over the Internet using various means of distribution. TrojanDownloader:Java/OpenConnection.IJ might arrive at your computer through spam email, or you can initiate the download of the parasite after clicking on some flashy advertisement. The most important thing is that you must refrain from clicking on links to unknown sites and flamboyant commercials. Also, it is strongly recommended NOT to open attachments from emails received from senders you don't know. That kind of caution would save you the trouble of being infected by the Trojan.
However, if you have caught this parasite, then you must deal with it. It might be hard to tell whether you have TrojanDownloader:Java/OpenConnection.IJ or not in your system, because the threat does not have an interface and it does not really make its presence known to you explicitly. Yet, there are certain ways to make sure you are being attacked. You need to check your Windows Task Manager. There are certain processes associated with this parasite, such as winsrmgr.exe or AdobeUpdate.exe. Both of these processes resist the interrogation of security products. What is more, AdobeUpdate.exe clearly makes use of the popular program name (Adobe) in order to appear innocent, while in fact is a malware dropper, which can download files of various content from the web.
Now that you have determined you have been infected by this Trojan, you need to get rid of it. It might be a bit challenging to do that on your own, so if you are afraid of making significant changes to your system, get yourself a reliable malware detector, which will take care of TrojanDownloader:Java/OpenConnection.IJ for you, and you won't need to worry about infections in your computer any longer.
Danger level: 7