Troubleshooting fitlet2 - UKLog.dat file on Windows 10 OS takes up all the free disk space
From fit-PC wiki
Observations:
On fitlet2 after updating the Windows 10, and in particular Intel Video drivers, customer can find a file called UKLog.dat created in the root of disc C:\.
This file grows quickly, so in a few hours the whole disk can be full
Reason:
Issue caused by a particular Intel Video driver versions (26.20.100.7463, 26.20.100.7755, 27.20.100.7989 are confirmed)
Solution:
Download and install the latest video driver from our Wiki Site (ver. 27.20.100.8478): fitlet 2 Intel Video Drivers for Windows 10