yup thats what its telling me.
error creating registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\SIERRA ON
-LINE\CAESAR 3\1.0.0.0
REGCREATEKEYEX FAILED; CODE 5.
Access is denied.
Can anyone help me out? ive downloaded a few games from
here and never had any problems.......thanks

Did you at some point in the past install a Sierra on your computer? The original Caeser 3 came with an obligatory service program which checked regularly for updates. If so, you should try to remove it first. And your present installation of Caesar too.

And you should try to avoid the standard folder of the installer. Create an folder like "C:\Games\" and install Caeser 3 into it. You can change the installation path clicking on options.

I hope it helps.

My Google-Fu indicates that "REGCREATEKEYEX FAILED; CODE 5" means that the problem is that for some reason you don't have permission to edit/create the registry key. If you're installing this on Win7/Vista then make sure you're running the installer as administrator, and if you're installing this on XP then make sure you're running it under an admin account. If you're already doing these things then you may need to go into the registry and set some permissions there, but try the things I mentioned first and we'll only delve into the registry if that doesn't work.

Disable your anti-virus software