The IBM Lotus Forms Designer must be installed by a user with administrator privileges.
Only a user with administrator privileges can install the Designer onto Windows Vista, as the user must have write permissions on the computer. When the Designer is installed by someone without administrator privileges, the user will be prompted for administrator logon.
Resolving the problem
Ensure you have administrative privileges prior to installing the Designer on your machine. If you do not have administrative privileges, you must have someone with administrative privileges install the Designer for you.