The following article shows you step-by-step how to downgrade Microsoft Internet Explorer (IE) version 11 to IE version 10 or whatever your previously installed version of IE was.
For companies implementing Oracle Primavera P6 Enterprise Portfolio Project Management (EPPM) R8.3.2 or earlier, you will need to downgrade your user base to IE 10. P6 EPPM is not supported and doesn’t work with IE 11. Whatever your reasons for needing to downgrade, the following steps show you the process.
Note: The steps in this ‘How To’ guide downgrade your Internet Explorer version by uninstalling the latest update. Therefor it will return you to the last version of IE that was installed before IE 11, which could be IE 10, IE 9 or earlier.
Also Note: The latest release of Primavera P6 EPPM R8.4 supports IE 11 according to the tested configuration document.
Errors encountered in P6 EPPM R8.3 related to unsupported IE 11 version: After login, users may see the following message:
‘Unable to initialize AdfAgent’ level=SERVER
error=message:‘AdfIEAgent’ is undefined
description:‘AdfIEAgent’ is undefined
How To Downgrade Internet Explorer 11
Step 1 – Turn off IE 11
Open the Windows Control Panel and type ‘program’ in the search field.
Under the resulting Programs and Features list, click ‘Turn Windows features on or off’.
In the Windows Features dialog, uncheck ‘Internet Explorer 11’ in the list.
Say ‘Yes’ to the following prompt:
Now click ‘OK’ in the Windows Features dialog.
Step 2 – Uninstall Internet Explorer 11
Once this dialog disappears, type ‘view installed’ in the search field and choose the ‘View installed updates’ option from the list.
In the Installed Updates dialog, type ‘internet’ in the search field to locate the Internet Explorer 11 list item.
Right-click on the Internet Explorer 11 list item and choose ‘Uninstall’.
Click ‘Yes’ to confirm the uninstallation.
There will be a short delay.
Then you will be prompted to restart your computer.
When your machine has restarted, run IE and verify the version you now have. If you have version 10, you can prevent further updates by unchecking the ‘Install new versions automatically’ option in the ‘Tools’ – ‘About Internet Explorer’ dialog.