wp-admin shows blank page, how to fix it?

Question

I am working with WordPress 3.5.8. Yesterday I made some changes into it to a friend. I don\'t know what happened, but after some time when I try to log in at wp-admin side and

Answer 1

i have wasted a lot of time to solve it , But the only solution i find is to rename your word press plugins folder and active theme , and your wp-admin will be visible , so then you can change and check for suspected plugin or theme.