If user gets the following error message:
The Oracle(tm) client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3 (or greater) client software installation.

Then, the steps outlined in the attached Microsoft Knowledgebase article may be helpful.

Some notes that we have found helpful:
1) Item #2 from the article has happened to us
2) Item #9 from the article has been an issue
3) Item #10 needs clarification. You need to set the permissions on the Oracle HOME directory which would be c:\oracle\ora92 rather than just c:\oracle. Note that ora92 does NOT inherit permissions.