Hi Carol, welcome!
Try a System Restore, choosing a restore point that pre-dates your problems: System Restore
If that corrects the problem, make sure that MSE is updated and run a full scan, also downloading, installing and running Malwarebytes: Malwarebytes' Anti-Malware: Malwarebytes
If a system restore doesn't
solve your problem, or if you are unable to perform the above mentioned tasks, then taking it in may be your best option (unless you have a computer savvy friend...).
Regardless, after the problem is resolved, you can learn how to create a System Restore point here: System Restore Point - Create
doing so regularly so that you will have options when disaster strikes.
You will find a wealth of information here, both in the user and tutorial forums. There are many willing to help. A great place to learn how to use your computer!
If you don't understand what some terms mean (such as MSE), you can search the term on www.google.com
Apologies if this information is elementary to you.