Have a look in the setup log for a guid in the error message near the
component it thinks is installed. You can then try and manually uninstall
that using the following from a command prompt
msiexec /X <your guid from your log here>

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>I uninstall any and all 2005 pieces and ran sqlbuw.exe
> But setup keep telling me there are pieces of the old version and will not
> install
>
> Any Ideas?
Ofer - 30 Jun 2005 23:21 GMT
msiexec /X <your guid from your log here> did not find the executables so it
did not clean the registry.
Only after Cleaning all reference in the registry it started working!
Anyway thanks for the advise it did point me in the right direction.
> Have a look in the setup log for a guid in the error message near the
> component it thinks is installed. You can then try and manually uninstall
[quoted text clipped - 7 lines]
> >
> > Any Ideas?