Civ4 Installed assets all good!
Warlords Installed assets all good!
BTS Installed assets all good!
Installed HOF mod good!
Edit: And @ Denniz. I'm the administrator account on that computer. Nothing there
The only other thing I can think of is the UAC. I think it mean user access control. It seems that Vista has all kinds of extra security stuff. Sometimes admin user isnt enough. Could you try the following Microsoft instructions with your Civ4 EXEs:
Scenario 2: Mark an application to always run elevated
Scenario 2 is similar to the previous scenario in that you want to run an application or process as elevated with the administrator access token. However, in this scenario you want to run an application that has not been marked by the developer or identified by the operating system as an administrative application. Some applications, such as internal line-of-business applications or non-Microsoft products might require administrative rights but have not been identified as such. In this scenario, you mark an application to prompt user for consent, and if granted, run as an administrative application. The following procedure steps you through that process.
Note:
To perform the following procedure, you must be logged into a client computer as a member of the local administrators group. You cannot be logged in with the computer (or built-in) administrator account because Admin Approval Mode does not apply to this account.
Important:
This procedure cannot be used to prevent UAC from prompting for consent to run an administrative application.
To mark an application to always run elevated
1. Right-click an application that is not likely to have been assigned an administrative token, such as a word processing application.
2. Click Properties, and then select the Compatibility tab.
3. Under Privilege Level, select Run this program as an administrator, and then click OK.
Note:
If the Run this program as an administrator option is unavailable, it means that the application is blocked from always running elevated, the application does not require administrative credentials to run, the application is part of the current version of Windows Vista, or you are not logged into the computer as an administrator.