|the best way would be to save all important files, pics, docs from the existing drive and doing a full nuke of the drive and re-installing the OS.|
That is one way of getting rid of that problem and making sure you are safe...I only do that as a last resort.
If you want to try getting rid of the problem without doing the above, download and run these in this order
2- tdss killer
After running the above and removing what is found, then run
3- Malwarebytes in full scan
Let us know if your problem still exists after that.
Some HELP in posting on Computing.net plus free progs and instructions Cheers