Hi Karen
I am Dave, I will help you with this.
Are you able to get into the Recovery Envinrment using the method below, and if so, can you get into Safe Mode?
Start your PC, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down
Do this twice
On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt... etc.