Just back from the trip to the volcanoes and reading up on the messages. I loaded AVG off the web straight after I got the massive number of updates from Microsoft site. Yes I am concerned where the virus reappered from so fast. My son and daughter also use this computer but have Limited Accounts, I normally also use a limited account except when I am in need of loading a program or twiddling. After this is sorted I will have an extreme sort through any back up files. For years my son had used an English Grammar CD which passed AVG scan OK, then after about three years after I had done a first antivirus check it suddenly showed a trojan when I tried to use it.