Actually I was trying to look for a workaround to make my store work. I followed some thread and did those things. I thought it would prompt me if I do something wrong. Well. The problem is solved now.
Like I said it asked for me for a password to enter into the admin account. I tried many passwords yesterday. But no success.
Today I tried to enter into it without typing any password and to my surprise it let me in. I never guessed it would be like this.
I restored my system and everything is fine now.
Problem solved.
Thanks for the reply.