Does your computer get this message when someone tries to sign into it:
"Your system is running low on resources. You cannot log on as a new user. Please use an account that has already been logged on"
If so, please restart your computer to resolve the issue.
This message occurs when too many users are simultaneously signed into the computer by using the "Switch User" option instead of log off.
To avoid receiving the error message in the future, ensure that everyone selects "Log Off" when they are finished using the computer.