what kind of log files are you referring to?
Can you give us the name of such a log file?
I'm not that Windows-savvy, but shouldn't the temp files be erased after restarting the machine?
Are you working on very large InDesign files?
CC 2015.1 or CC 2015.2 ??
Files in the Temp directory are not automatically erased, but there's no reason not to do it manually...