If you are trying to free up space on your system drive you may run across a very large log file in the system32\wbem\logs folder:
SYMPTOMS
When you use Windows Management Instrumentation (WMI) and you configure it to log all events on your Microsoft Windows Server 2003-based computer or Microsoft Windows XP-based computer for quick analysis and troubleshooting of problems, the file size of both the Framework.log and the Framework.lo_ files may be greater than what you configured for them.