Is the problem solved?

I've just encounter the same issue

Cluster is Windows Server 2012 R2

SQL 2012 /w SP1

There are warnings about single network adapter, but other are all fine

Until the step to enter service accounts details, after I enter the DB engine service account, and click the to the other box to enter the Agent service account name, I need to wait 4-5 minutes before I can type anything, then after I entered both passwords of the accounts and clicked next, I need to waits for 15+ minutes.

At the page to configure driver to store data and log, each click between options need to wait for 4-5 minutes

We then stopped here. Then we tried to install SQL 2008 R2, very smooth to finish.

any hints for this?