Final answer:
Event Viewer is the best utility to check for error codes when a PC freezes up at the same time every day. It provides detailed information about system events and can help diagnose the cause of the issue.
Step-by-step explanation:
The best utility to check for any error codes when a customer's PC freezes up everyday around the same time would be Event Viewer. Event Viewer is a built-in tool in Windows that allows you to view detailed information about system events, including error codes. It records events and provides logs to help troubleshoot problems.
In Event Viewer, you can navigate to the Windows Logs section and check the System and Application logs for any related error messages or codes. This can provide valuable information to diagnose the cause of the freezing issue.
By analyzing the error codes reported in Event Viewer, you can identify potential software or hardware issues that might be causing the PC to freeze at a specific time every day.