Install or deinstall Oracle Developer 6i in window 10

 Step1: https://www.youtube.com/watch?v=c8iVItLhQgY

Step2: Open the Dev_setup folder\ win32 \ ssf \ 6_0_0_0_0 \ install \ SSF60.INS file with a text editor (example: Notepad ++). Delete lines 219 to 231 in the following sections:

Step3: copy(dll_rest);
/******************
Install ODBC support
*******************/
ui_action(instantiate(install_files));
copy(odbc1);
copy(odbc3);
{copy(odbc2,"%operating_system%");}
['WRITE_ERROR: continue();] /*the current NT installer is using ctl3d32.dll which is in this
odbc2 group. This is causing write errors in .ins*/
copy(shrdll,"%operating_system%");

Step4: After being deleted, install the Oracle forms / reports as usual.
=====================================================================
DE INSTALL
To uninstall follow these steps:

1. Go to Services and make sure that all Oracle services are stopped.
2. Invoke the Oracle Universal Installer (OUI) to uninstall the software.
3. Go to Start->Run and type 'regedit' to invoke the registry editor.
4. Navigate to HKEY_LOCAL_MACHINESoftware and delete the Oracle folder.
5. Right click on My Computer and select Properties. Click to access the Environment Variables. Find the PATH environment variable and edit it to remove any occurences of Oracle directories.
6. Using Explorer, remove any remaining Oracle directories, notably the ORACLE_HOME and C:Program FilesOracle. If there are files you cannot remove, reboot your machine and retry the delete operation.

You should now have a clean machine that you can reinstall Oracle on