Resolved Google Chrome, "Go Back" button presses automatically

A problem appeared in my PC which default browser id Google chrome that when I try to write a username of any site or compose a mail in Gmail ot chat, the go Back button at top left corner of screen presses automatically and the go back option drops down as mentioned in attached picture. Could not understand what happen. The problem appears during typing in any web site while other places (like Excel Word etc) ok. Please guide what could be the problem.

 

Possibly Malware. Read this post, then post the requested log(s) in the Malware and Virus Removal forum.

 

Un-installed then re-installed and ok.

 

Good news.

 

Problem again started.

Dear Moderator,
I don’t know what should do in such case as problem resolved but again appeared. Should I start a new thread or continue it?

 

Read this post, then post the requested log(s) in the Malware and Virus Removal forum.