If you are doing a single server install, You would do the Full installation. The only option you will need to worry about is the Web server and if you are going to use IIS or the QlikView web server.
When you get to the screen where you select the setup, if you see the below where you have an option to install either QlikView Webserver or IIS then IIS is installed on the machine. If the only option is QlikView Webserver then it isn't. If both options are there you will need to decide which webserver you want to use.
Also, as a note, the service account has to be a member of the local Administrators Group.
Bill - Designated Support Engineer at Qlik To help users find verified answers, please don't forget to use the "Accept as Solution" button on any posts that helped you resolve your problem or question.
Just to follow-up on Bill's post, you can check the current Qlik services on the existing version, you are looking for the Settings service if using IIS and if you are using our web server it will be Web Server... That should give you a bit more confidence hopefully.