Several things:
1) Make sure that you are installing at leaset O8i version 8.1.6 or higher as nothing less is supported on Windows 2000.
2) Make sure you are installing from a CD intended for Windows 2000 and not just Windows NT. The NT CD will not install on Win2K.
3) that you are not installing to a directory wint spaces or special characters in it as the Oracle_Home.
1) Make sure that you are installing at leaset O8i version 8.1.6 or higher as nothing less is supported on Windows 2000.
2) Make sure you are installing from a CD intended for Windows 2000 and not just Windows NT. The NT CD will not install on Win2K.
3) that you are not installing to a directory wint spaces or special characters in it as the Oracle_Home.