Windows Server Backup Logs Location

If you are using the Windows 2008 / 2008 r2 / 2012 or 2012 r2 native backup, the basic log files may be found in c:\Windows\Logs\WindowsServerBackup.
These logs may be easier to read than the event logs, and give a better indication of any faults.  Additionally it will list any files that fail to backup.

NTFS Uncompress entire drive

Found a PC with performance issues, not sure how it happened but the entire system drive was compressed using NTFS compression.  To uncompress the entire drive, I used the following commands (system drive was c drive):
cd /d c:\
compact /u /s /a /i
It takes a long time to process all the files.