Hi hoosier67,
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.
Go to Troubleshoot - Advanced Option - Command Prompt
Run this command and hit Enter:
chkdsk C: /f /r
That command will take time to complete, but should resolve this issue for you !