Follow these steps upgrade core Windows Authentication if you have implemented pervious version of TTT Authentication
(ignore step 2, 3 if you didn't install TTT Authentication Signin module)
1. Logon as Host
2. Go to Admin/Site Settings page and change Logon page back to default DNN logon page
3. Go to Module Definitions page remove TTT Authentication Signin
4. Remove TTT Authentication module
5. Open Host Settings page, clear cache
At this point we're ready to upgrade DNN to 3.2.
6. Unzip new DNN 3.2 package
7. Rename release.config into Web.config and modified required configuration value (i.e database, objectQualifier, MachineDecryptionKey…) . DO NOT enable httpModule for Authentication at this time (keep it comments out)
8. Open your DotNetNuke site in web browser, to process DNN upgrade
9. Open IIS Settings, change security setting Admin\Security\WindowsSignin.aspx depends on your Authentication type (the old DesktopModules\Authentication\Logon.aspx is changed to this file)
10. Open ModuleSettings table change the value of ProviderTypeName
from DotNetNuke.Authentication.ADSIProvider, DotNetNuke.Authentication.ADSIProvider
into DotNetNuke.Security.Authentication.ADSIProvider, DotNetNuke.Authentication.ADSIProvider
or you could delete all records related to old Authentication settings.
11. Logon as Admin, go to Admin/Authentication to re-configure Authentication settings (You might not need to change anything here since the old settings still valid)
12. Open Web.config, remove the comment of Authentication httpmodule to enable Windows Authentication automatic logon.
Now, core Windows Authentication is ready