So you have been using Google Chrome for a while and suddenly it is not working the way it used to.
You can reset it but you could also use the Chrome Cleanup Tool
The Chrome Cleanup Tool will:
“Scan and remove software that may cause problems with Chrome, such as crashes, unusual startup pages or toolbars, unexpected ads you can’t get rid of, or otherwise changing your browsing experience”
The Chrome Cleanup tool can be downloaded from this link : Chrome Cleanup Tool