Hi,
Previously I used to copy various Press Releases form Websites and past the same in MS Word. I used to copy only News Headline and Weblink.

After pasting Weblink and pressing Enter key, the text becomes hyperlink.

But Now it not happening like this.

Are you saying this is a problem that is in Word 2013 but not in Word 2010?

I suspect that the hyperlink was inserted into your clipboard by the website and that this is not happening any more. I do not know this, just suspect.

I am using word 2013 only.

Suppose if I type www.Google.com in MS Word. It will covert into Hyperlink with blue font having underline. So that if we click on google, it will automatically open browser.
It is not happening now.

I am using word 2013 only.

Suppose if I type www.Google.com in MS Word. It will covert into Hyperlink with blue font having underline. So that if we click on google, it will automatically open browser.
It is not happening now.

This is an AutoFormat as you type feature that can be turned on or off. I keep it turned off on mine because I produce written paper documents and do not need the link nor the underline.

File > Options > Proofing > AutoCorrect Options (button) > AutoFormat as you type (tab)

Internet and network paths with hyperlinks

Thank You. It has worked

You are welcome. Glad to have helped.