This error may occur if you have attempted to remove Lotus Notes. If attempting to remove Lotus notes, the uninstall program may not remove some of the entries in the Windows registry or in the Win.ini file. The problem occurs when you have removed Lotus Notes, or if it is installed but has not been installed properly.
There is a solution when - Installation ended prematurely ...
To remedy the situation, download Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a) and apply the update.
Other remedies may also fix the problem. Microsoft does have a workaround for the problem, and you can download a repair utility to fix the issue at http://support.microsoft.com/kb/234435/. Download the file and run it, and then restart the computer.
TipFor more information, please see: How to fix Installation error #2343