Hi,
Type 'regEdit' in your start 'Search Command' and Navigate to:
HKEY_LOCAL_MACHINE/Software/Neolane/NL_5/nlclient.
If Neolane folder is present, delete it and then try to reinstall the Neolane folder.
Also check whether you have :
HKEY_CURRENT_USER/Software/Neolane/NL_5/nlclient folder present or not.
and define value for
confAdvisedUpgrade
It should be your build version.
Thanks.