How to Fix Login Failed in Magento

I've tried installing magento on my windows box and after successfully configuring the modules required, it installed without an error.

Unfortunately, when I tried to login in the backend, it doesn't give an error but it remains in the same page. When I used a different username or password it gives an error so I was confused.

And then I've tried changing the localhost to 127.0.0.1 and it works, wow :-). Or maybe you can edit your hosts files of windows.