NZ Home & Office 32 doesn't appear to be available anywhere. I tried to use the official website, but no information is provided. I have also used Google, but still no results could be found. The software might appear to be discontinued, hence the lack of information.
However, if you still have the software, right-click it and choose Run as Administrator. The installation procedure should be straightforward.
There is no other resource that can be used for this issue.