Thank you so much for your replies!
It was a viral attack in my computer! Something called Positive Finds.
It never allowed me to do my ads and play clixgrid.
But after a long long struggle I got rid of it!
The following site was helpful to get rid of the attack,
Remove "Ads by Positive Finds" virus (Removal Guide)
And also I uninstalled and reinstalled my Google chrome and other programs which was affected by this virus.
Now my PC is good to go!!
Thanks again guys for your wonderful support!
Love you!