How to change my D-Link DIR-615 password? I have checked the manual, I have the right version of internet explorer but I can't get in as admin only as user.

First its not a good idea to piggyback your question on another thread. This can lead to confusion. So I've moved your question to its own thread.

However, the advice to reset the router applies here as well. If you don't have the Admin password, you can reset the router and restore factory defaults.