Try scanning your computer with Malwarebytes to remove infections.
www.malwarebytes.com
Malwarebytes is primarily a scanner that scans for and removes malicious software, including rogue security software, adware, and spyware.
Our suggestion is you download Malwarebytes, install, run, remove any infections and once finished empty it's quarantine.
You can:
Buy Malwarebytes and use the premium version
Leave it installed for manual use running as the Free version
Uninstall it once you have finished and reinstall again in the future as required
If you would like to leave it installed and use it manually, deactivate the premium trial and turn off start with Windows.
In Malwarebytes:
Click the gear icon (top right)
Click Account
Click Deactivate
Confirm Deactivate
Go to Security
Turn off start with Windows
Need Help? See Malwarebytes How-Tos
This link is their youtube channel
https://www.youtube.com/channel/UCB7JQhkZpiyvGPufW2RPBoQ
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