I am setting up tools on a new Windows 7 PC that my company issued me and have everything working except TOAD. I installed oracle 10.2.0.3 on my PC and setup my ORACLE_HOME and TNS_ADMIN environment variables. I also set up by TNS file and host file. Afterwards I installed TOAD 10.1.1.8 as well as SQL Developer. I am able to connect to any database setup in my TNS file through SQL plus as well as through SQL Developer. But when I open TOAD, my oracle instalation is not appearing in the "Connect Using:" box when I try to make a connection. The only thing that appears there is an old installion of oracle 8 that was partially copied over when the tech staff copied files from my old PC to my new one. That installition is invalid and doesn't work. I looked through the TOAD user guide, and it has the following information about how it finds clients: How Toad Finds the Oracle Client DLL 1. Toad first looks in the Toad command line for OCIDLL. 2. If this is not found, Toad looks for the path for the Oracle home as follows: 3. If the command line argument "ORACLEHOME" was passed in, then Toad will use that home. 4. If there is no Toad home defined then Toad will display the home that is set as the default home using Oracle’s Home Selector application as the default in the dropdown. Toad will use the home that is active in the dropdown. 5. To populate the dropdown, Toad searches the registry as follows: First, Toad reads the list of Oracle home names from the keys under HKEY_ LOCAL_MACHINE\SOFTWARE\ORACLE\ALL_HOMES If no Oracle homes are found there, then the Oracle home is set to HKEY_ LOCAL_MACHINE\SOFTWARE\ORACLE Otherwise, Toad finds the ORACLE_HOME value for each Oracle home, if it exists. Then Toad checks the system environment variable called PATH to see whether it contains the "bin" folder under ORACLE_HOME. Toad selects the Oracle home whose path appears first in PATH. If Toad still hasn't found an Oracle home, it uses HKEY_LOCAL_ MACHINE\SOFTWARE\ORACLE. 6. Toad looks for the client DLL in the "Bin" folder under the path found for the Oracle home If that fails, Toad looks for the ORACLE_HOME key under HKEY_LOCAL_ MACHINE\ORACLE\SOFTWARE, and look for the client dll in the "Bin" folder under that. If that also fails, Toad looks for the client dll in every \bin directory in PATH. I checked my registry, and my oracle installion does appear in a 10g folder within HKEY_ LOCAL_MACHINE\SOFTWARE\ORACLE. What else can I do to try and get TOAD to find my 10g oracle installion? Thanks for any help you can give.