after giving name and password i'm not able to login to the system.
I suspect that the desktop environment is missing.
Depending on your desktop environment, run
sudo apt install -y zorin-os-desktop
if you're using core or
sudo apt install -y zorin-os-lite-desktop
if you're using lite.
after doinfg this my system works perfectly but there is a problem I'm not able to open any folders, and terminal etc..
..after clicking the folder nothing happens
Maybe... updating might help? I see in the picture you gave us that there are updates. (See X updates can be applied)
First, see if you can do Ctrl + Alt + F2 to get back into the command line environment, then run
sudo apt update && sudo apt full-upgrade
Also, can you try accessing your folders from the command line environment?
For example:
cd [Path to Folder]
replacing [Path to Folder] with the path to the folder you want to access, e.g.,
cd ~/Documents
to change directories and
ls
to see the contents in the folder.
That, or... it might be a broken install.
im not able to do ctrl + alt +f2
I am so sorry, it's Ctrl + Alt + F3.
Dependency problems?
But can you still access your folders in the command line environment with the command I gave you? 
now after restarting i got this..error.
but after complete rebooting i can login to the system but now my mouse and keyboard is not working.
I might have messed you up there. I can only apologise...
In that case... maybe someone like @Aravisian can help you with this?
@Aravisian, please forgive me.
should i re install zorin os? if i do then all the data will get deleted.. and my mouse and keyboard is also not working.
I do not think you did. I think his hard drive did. A sector failed taking critical system data with it.
Are you able to boot from a LiveUSB of Zorin OS, then access your drive to move your personal data onto a USB or External Hard Drive?
Once that is done, reinstall Zorin OS.
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