Sounds like a simple case of Adware. Please run the tool below and post the log produced after the reboot.
Click on this link to download : ADWCleaner Click on the Download Now button and save it to your desktop.
NOTE: If using Internet Explorer and you get an alert that stops the program downloading click on Tools > Smartscreen Filter > Turn off Smartscreen Filter then click on OK in the box that opens. Then click on the link again.
Close your browser and double click on this icon on your desktop:
You will then see the screen below, click on the Scan button (as indicated), accept any prompts that appear and allow it to run, it may take several minutes to complete, when it is done click on the Clean button, accept any prompts that appear and allow the system to reboot. You will then be presented with the report, Copy & Paste it into your next post.
NOTE: If for any reason the report does not appear, open Windows Explorer and click on the C: drive in the left pane, in the right pane you should find a new folder called Adwcleaner, double click on it and you will see the saved logs. Find the log that has a number in brackets starting with an S NOT R, similar to this: Adwcleaner[S1], double click on the one with the highest number and the log will open, Copy & Paste it into your reply.

Click on this link to download : ADWCleaner Click on the Download Now button and save it to your desktop.
NOTE: If using Internet Explorer and you get an alert that stops the program downloading click on Tools > Smartscreen Filter > Turn off Smartscreen Filter then click on OK in the box that opens. Then click on the link again.
Close your browser and double click on this icon on your desktop:

You will then see the screen below, click on the Scan button (as indicated), accept any prompts that appear and allow it to run, it may take several minutes to complete, when it is done click on the Clean button, accept any prompts that appear and allow the system to reboot. You will then be presented with the report, Copy & Paste it into your next post.
NOTE: If for any reason the report does not appear, open Windows Explorer and click on the C: drive in the left pane, in the right pane you should find a new folder called Adwcleaner, double click on it and you will see the saved logs. Find the log that has a number in brackets starting with an S NOT R, similar to this: Adwcleaner[S1], double click on the one with the highest number and the log will open, Copy & Paste it into your reply.
