Seems that this system file stores lots of info regarding file accessed but does not seem to be cleaned by CCleaner - can this be added to the to do list?
fwiw, on the topic of the usnjrnl, you can delete it by running (as admin if needed)
fsutil usn deletejournal /d X:\
where X is the drive from which you'd like to delete usnjrnl
Some time ago I read that NTFS was more reliable than FAT because Microsoft had copied journalling and transaction logging from UNIX
I believed that Microsoft would copy from others.
I doubted that the result would be more reliable - UNTIL :-
My Laptop with a single HDD lost all 3 off NTFS partitions and 3 off FAT32 and FAT partitions due to damage to the partition tables,
and Minitool Boot Recovery CD fixed the partition tables and the MBR, and then everything worked - EXCEPTING
That when Windows first booted it insisted that Chkdsk had to run on one of the FAT32 partitions,
and it fixed a vast amount of corruption there.
Windows tolerated all the other partitions but I ran Chkdsk anyway and the other FAT partitions had a significant amount of corruption,
but the NTFS partitions just had a few minor security issues.
I suggest that by removing this $Logfile the NTFS partition will be much less reliable, as bad as and possibly worse than FAT32,
and it would be irresponsible for CCleaner to purge this file.