Hi and thanks for reaching out. My name is William, I’m an Independent Advisor. I'll be happy to help you out today.
First, have you confirmed that SHCore is, in fact, missing?
Since this is a system file, try running the following commands from an elevated command prompt:
sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth
If that does not help, restart the computer > at the logon screen, hold down the Shift key and while selecting the option to Restart. This will start the OS in the Windows Recovery Environment. From here you can select the Troubleshoot option and then select the repair or restore options. I recommend you backup any personal data before you do this.