Click On buttons not responding in IE11

Hi all,
I am using SONY VAIO laptop with Windows 7 Ultimate.
It was working fine so far, but from today I am facing an issue with the internet. In my Internet Explorer 11, in few web pages few clicks on buttons are not working. For example, In few websites the Sign In button, Next page button and Page Number buttons are not working. If I use Firefox the same web pages are working fine.
Is this an issue with Windows 7 or the IE11? Anybody facing the same problem? Please help me out to figure out the reason and the solution for the same. Thanks in advance!
