help please

Device or computer?

Device

Do you have access to another network where you can try to log in? That has worked for several people.

Try a restart.

Try a forced restart.

Reset Device

Reset – iPhone 7

Hard reset

Computer

Try setting up another admin user account to see if the same problem continues. Also try the Safe Mode.

Safe Mode - About El Capitan
also Sierra

Safe Mode Startup – El Capitan. also Sierra

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

The mentioning of DLL files suggests that it might concern the Windows operating system.

For Windows 8.1/Windows 7/Windows Vista it might be fixed with an update: “Update for Universal C Runtime in Windows”, as that includes the mentioned DLL.