Hello first posting so I hope I do this right. I have just updated my OS to XP from 98se. Well it's a new machine so a fresh install of XP. In the past when I have updated machines I have just copied the C-Bus directory with all it's files onto the new machine and run the install program received from CIS site. I have done exactly the same thing in this instance but with no success. When I go to run Cbusv2 I get the error that C-Bus isn't installed correctly. To rectify re install. If I re install, same thing. I tried with V2.7.6 and then with V2.7.7. Maybe I need an older version. Does any one have any idea's of what I can do? Thanking you Steve