Apologies for the initial confusion. I'll be helping you from now on.
I suspect your problems are being caused by a rogue Google Chrome extension
First, open up Google Chrome and click on the menu button (three horizontal lines, close to the top right of your screen)
Then click on Settings
Now click on the Extensions link in the menu on the left hand side
This will bring up a list of extensions. Look through the list for any you don't recognize, and delete any such extensions by clicking on the trash bin icon to the right of the extension.
If there are no such extensions, you will want to make a note of the extensions you have installed, because the next step will remove them, and you will need to reinstall them. If you find such an extension, and removing it fixes your problem, there is no need to perform the next step.
This step will do the following: This will reset your homepage, new tab page and search engine, disable your extensions, and unpin all tabs. It will also clear other temporary and cached data, such as cookies, content and site data.
If any of the above items are important to you, make a note of them or back them up before proceeding.
If the previous step failed to find any rogue extensions, you will want to reset Google Chrome.
Open the settings menu again
Scroll down to the bottom of the page
Click on Show advanced settings...
Scroll to the bottom of the expanded page
Click on Reset settings
Untick the box Help make Google Chrome better by reporting the current settings
Wait for the process to finisih, and then close and reopen Google Chrome
Does this fix the problem? If this doesn't fix the problem, is it also a problem when using other browsers (e.g. Safari)?