Microsoft OLE DB Provider for ODBC Drivers error 80004005

I have encountered below exception while executing classic ASP application. This exception was occurring whenever my application trying to connect with oracle database. But on same machine other applications were running without any issue. After spending some time I came to know that this issue was occurring because I was trying to run 32 bit classic ASP application on 64 bit machine (Windows 7).

Exception:
Microsoft OLE DB Provider for ODBC Drivers error '80004005'
[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

Fix:
Open Command prompt (Run as administrator)

2. cd %systemdrive%\Inetpub\AdminScripts or go to "AdminScripts" folder under "Inetpub" folder
3. Execute following command- cscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 1

Issue got resolved after executing above command because "Enable32BitAppOnWin64" is a boolean property and indicates whether to allow 32-bit applications to run on a computer that has a 64-bit processor. I hope above information will save your time.