sdx.cvd is a dangerous file. If you found it in your system, it's a sign that your PC is infected with RealAV, XP Police Antivirus or other cyber threat. Of course, there is another sign showing that your system can be infected with these threats. This sign is annoying alerts that all report about hundreds of different viruses and then offer removing them for a specific fee. Please, do NOT take these malwares seriously, no matter what alerts they display. Otherwise, you can easily lose your money. You should ignore all alerts that belong to these malware and scan your computer with reputable anti-spyware for eliminating it.
sdx.cvd is created as soon as dangerous parasite, which is related to it, enters computer. This file is mostly used for infecting system with malicious files, blocking legitimate softwares, downloading virus updates or simple displaying commercial advertisements that offer people to purchase this fake licensed version. However, it may also be used for seriously dangerous tasks, so you must remove sdx.cvd from the system ASAP. For that we recommend using RegCure Pro. For removal of RealAV, XP Police Antivirus and other rogues, you should use Reimage.