The file is a log file generated by the Simplix UpdatePack7R2 , a popular third-party tool used to integrate updates into Windows 7 SP1 and Windows Server 2008 R2 distributions. 1. What is in the log?
If an update fails, the log will record a specific error code (like 0x800... ), which is vital for troubleshooting why a certain patch didn't "take."
You can usually find it in the %WinDir% folder (typically C:\Windows\UpdatePack7.log ) or in the same directory where you ran the UpdatePack executable.
Are you seeing a specific at the end of your log file that you'd like me to help translate?