What is the error message for the missing .dll file(s)? What is the result of trying a repair install from Add and Remove Programs? Is the error message the same? Can you provide Screen Shots? If you have more than one you can imbed them into a word file or .zip and post to this thread.
Douglas Lauritsen, Autodesk Product Support
Do either of these registry keys exists?
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\7D2F387500089040002000060BECB6AB
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\7D2F387500089040012000060BECB6AB
Right-click on 7D2F387500089040002000060BECB6AB in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\7D2F387500089040002000060BECB6AB
and choose Export.
Once it is backed up, and not before, delete it then try the installer again.
When the export completes and you have Civil 3D installed and operating again you can delete the .reg file.
Douglas Lauritsen, Autodesk Product Support
We appreciate your quick feedback on this forum!
Can you post the .log files that were written to the user's temp folder? The information you posted indicates it would be here C:\DOCUME~1\Angel\LOCALS~1\Temp\. But to be sure you can type %temp% in the Windows Explorer address bar or in Start > Run. There should be several so please zip them up and post the .zip as you can only upload a single file per message. This way you don't have to post many messages to the thread.
Douglas Lauritsen, Autodesk Product Support
We appreciate your quick feedback on this forum!