I followed instructions for deleting registery files, but I found the following files lurking in an arean not mentioned to delete.
HKLM\System\ControlSet003\Enum\Root\LEGACY_VSMON
HKLM\System\ControlSet003\Enum\Root\LEGACY_VSDATAN T
Is it safe to delete, these were left over from my last attempt at re-installing, still have not given up, problem is that it is now a challenge to get it working again.
Portie.