I noticed recently (on my new installation of Windows) that a file named “dvxa_sig” kept appearing on my desktop. My initial inclination was that it was possibly some kind of trace of a malicious element, but upon a quick search, I learned that it was simply the result of not having the latest codecs installed. To get it to stop appearing, install the latest Windows Media Player version or download a codec pak such as defilerpak (a previous tip of the day, found at http://hellninjacommando.com/defilerpak/). This will end the annoyance of the ever-appearing text file.