Hi there,
I have installed the SS on local drive and now trying to access it at: http://localhost:42635/
which is displaying the default home page fine, but to edit it I need to open the CMS, see attached image ("Welcome to SilverStripe! This is the default homepage. You can edit this page by opening the CMS. You can now access the developer documentation, or begin the tutorials.") after which it doesn't recognise my current SS login details at: http://localhost:42635/Security/login?BackURL=%2Fadmin%2Fpages

I presume I am supposed to use the same ones I log in to this SS main page??
Sorry to be ignorant but I haven't found an answer anywhere... :(

Thanks for all your help in advance!!

Hi I too have the same problem :(

In your mysite/config.php, set a default username and password with:

Security::setDefaultAdmin('admin','password');

Then log into the CMS with those details, set yourself up a new admin account, then make sure you remove the code from config.php again.