Thanks for offering to help.
I have been using the standard rally school of late, and everything works fine with that (I'm on Win7 Home 64) but that is with only RSRBR4 installed - which also works just fine.
I have the complete car packs (all-in-one) installed and I installed the lot as per instructions given. RSRBR2010 plus the 3 updates, in order, then the car pack.
The RS Center will start - so will the config apps, but RBR itself will not start from any shortcut, nor from RS Center.
I uninstalled it now - but I will install it again when I have sorted a problem with my wheel (the car is not reacting quickly enough, so the wheel prob needs calibrating - control was fine with my G25 previously).
I'll make a note of any issues and all steps taken and ask in the forum if I have similar issues next time - thanks again

Jonny