Now I don't know the actual name of this virus because, after a few weeks of fighting, I finally managed to eliminate this thing from my PC. First I tried with my anti-virus: Norton Antivirus 2002 with all the updates made, but the virus still was in my PC. The interesting thing was that this virus or worm (I remember that it is a worm rather than a virus) copied or moved some files on my PC, from a location to another. It did this almost constantly. When Norton Antivirus signaled the file containing the virus, I checked with Total Commander and the file was already gone. So when I clicked to clean that file it was nothing left to clean. Yesterday I uninstalled Norton and installed McAfee. Now that works! After checking my PC for viruses found all the files containing this virus and cleaned or deleted those files. I don't know for sure but it looks like McAfee is far better that Norton.