What do you need to uninstall from your server if the installation with AutoSPInstaller wasn’t successful?
Installing a SharePoint Server with the AutoSPInstaller job has become the gold standard for administrators. It’s much easier for large farms and offers a high degree of quality. However, using AutoSPInstaller can be a bit of a hassle. Until you get the xml configuration right, you normally need a few approaches. You can start the installation again, but you need to remove a few things first before it will re-run successfully.
If you are installing language files with your SharePoint Farm, remove these packages first. Open the Windows Control Panel, go to Programs -> Uninstall a program. Search for any SharePoint Language Package that has been installed and remove them all.
Leave the Control Panel open. Search for the SharePoint Server binary installation package and remove that file as well.
These files must not be removed. They can stay on the server.
Internet Information Server
Open the IIS Management and look for any Web Application that was created during the AutoSPInstaller setup. Remove all of them and the Application Pools as well. Because AutoSPInstaller will create all of them again, I normally delete all Application Pools and Web Applications from IIS. This way I’ll have a clean system after setup. The Web Applications create directories in the VirtualDirectories folder of the IIS working directory. You normally find it here: C:\inetpub\wwwroot\wss Remove the folders from the Web Applications you have deleted from here as well.
Remove the log files from the ULS logging directory or do a clean up after you sucsessfully installed SharePoint.
If the SharePoint Search has been created already, go to the directory where the search index is stored. Delete all GUID directories you find there.
Open the SQL Management Studio and connect with the SQL instance you are using to host the SharePoint databases. Delete any database that has been created by the AutoSPInstaller script. At the prompt to delete the database, you should select to close any connection to the database.
Now reboot your server. After login back into the server you can restart the installation with AutoSPInstaller. Any traces of previous installations will be gone then.