Thank you for your reply. I did read many posts and got to know that the admin folder will be renamed, as I have installed on the localhost, I am not sure if I am looking at the right folder which is "adminps" in my case.
I did delete the install folder and files as soon as after the installation was complete.
After the installation was complete, it gave me two options
i) link to access back office
ii) link to access the front office
On the first day I was able to access the back office and made few changes like adding the logo and categories. After I restart the system. I am not able to access the back office, I don't know how to get to the back office or admin login page.