Your laptop is infected by Adware a type of Malware which usually goes undetected by regular anti virus applications. The Malware gets downloaded when you visit infected webpages. You can remove the infection by scanning your laptop with Malwarebytes Anti Malware.
Go to Malwarebytes.com and download Free Version. Free version will take care of the issue. After installing, scan your laptop. While scanning is on, keep laptop isolated form the net.
After above scanning and removal of adware, it would also be a good idea to restore your PC to a previous set point.
Restart laptop , Press F8 and select SAFEMODE, you will be asked whether you wish to restore the PC. Select a date when your PC was free of infection. (Say a month ago?) and click restore.
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