Thanks for your reply Yasser.
The problem arose originally because I had upgraded from Vista to Windows7.
I had previously had Microsoft Works Suite 2006 installed and Microsoft advised that this package was compatible with Windows 7. Unfortunately the Autoroute2006 part of the package wasn't.
I then bought Autoroute 2007 which Microsoft said was compatible but after installation I still got the same "registry settings" message.
I then uninstalled both Works Suite 2006 and autoroute 2007 to give me a fresh start.
The next step was to install Autoroute 2007 which then worked perfectly.
Having done this I reinstalled Works Suite 2006 (excluding autoroute 2006) - this also worked fine.
Unfortunately when I then tried to run autoroute 2007 again, I got the same "refistry settings" message.
It was obvious then that there was a conflict between the Works Suite and Autoroute 2007.
The problem was then solved by entering the following sequence
Control Panel
System & Security
Troubleshoot common computer problems
Programs
Program compatibility
Microsoft Autoroute 2007
Troubleshoot program
The program requests additional permissions
Having followed this chain, which only needs to be followed once, when I then try to run autoroute 2007
I am asked the usual question "Do you want to allow the following program to make changes to this computer"
By selecting "yes" i can now run the program satisfactorily.
This might seem a long way round but it has worked.
I had done this before I read your reply so I haven't tried your suggested solution.
Regards
Jackinhoniton