I found a file that keeps popping up in my C:\ drive root, Log.txt ... after installing Process Monitor and seeing what process was writing to it, I came across PWMDBSVC.exe, which appears to be part of the Lenovo ThinkPad software. Even if I delete it, I can get it to re-create the Log.txt when I lock and unlock my workstation. Does anybody know what this software does and whether it is safe to disable? I searched Google already and got the usual pile of useless hits on the process name but nothing seemingly definitive!