Hi there I had this problem and after reading all the posts I was about to
give up. Anyway here is what I did.
Remove Norton Internet Security
That when the problem started. As other posts will tell you this is due to a
poor uninstall.
I then removed all remaining directories and registry entries
STILL no Joy
I then looked at the following file
C:\$windows.~bt\sources\panther\setupact.log and it looked like it was still
finding some Norton stuff. I couldn't work this out anyway I finaly figured
it out.
There were STILL some orphan short cuts in my Start Programs list ie if I
clicked on Start then All Programs there were still some references to Norton
even though I had removed everything I could find etc.
This solved the runtime error problem.
The real bummer is once I sorted that out I got a file transerf error at 80%
AFTER I deleted the download

So I need to download etc and burn slowly the
DVD.
Anyway hope the above helps and dont delete the download untill its installed.
"John Westlake" wrote:
> When ever I try to instal Vista, I get to the checking compatability stage on
> upgrade.
>
> And then it comes up with the message:
>
> "Runtime Error!
>
> Program C:|$WINDOWS.~BT\Sources\setup.exe
>
> abnormal program termination"
>
> Screenshot: http://img96.imageshack.us/img96/8246/untitled3my2.png