Hi Chris and fishmanoz I'm very sorry for using the arrow and blue box, I'm very new not only to dcc and railmaster but also to forums in general and I had thought that it was like the reply button on emails and that's why I had used it. However as I had said that I would like to thank everyone who had replied to my question regarding Windows 10 and also the reason I had went back to square one was that it was a new computer purchased for to use railmaster with my layout, and the computer had not only Norton av and fw but also McAfee security as well so when I had reset my computer I had uninstalled both software from the hard drive before I had installed the railmaster and relied totally on Windows defender for the security as I only intend to use this computer on my layout with railmaster. Thanks very much again to everyone Hedley