It sounds like you have inadvertently picked up a (PUP) Potentially Unwanted Program. You can try running Malwarebytes (Free) To keep it free, do not enable the Free Trial/or Activate the paid Version. I would follow up with AdwCleaner.
These Superb Free Tools and more can be obtained here: Anti-Spyware/Malware & Hijacker Tools
You may find these two articles most informative; PUPs - Potentially Unwanted Programs - Basics
All the Best,
Thank you for your prompt response. Glad that all is OK. Should you need further assistance, Please feel free to contact us.
Wishing you all the Best