It sounds like you’re referring to a of a Windows system file ( Cep21reg.exe ) with a checked runtime assertion or diagnostic output: "Checked 4" .
Cep21reg.exe - Checked 4 could mean:
Are you attempting to a legacy version of Cool Edit Pro, or are you investigating a system error log ? Cool Edit 2000 and Windows 10 - Adobe Community Cep21reg.exe - Checked 4