Mystical files in C directory


The following files are shown in the root directory of my C drive, no
file type is shown, 5 of them are 0 bytes and 1 is 12Gb. I would be
grateful for some indication of what they are and if I can delete the
12Gb one to free up some memory.


t180.1 0
t18g.1 0
t18k.1 0
t190.1 12,482,932,736
t194.1 0
t194.2 0

Thank you,
John.
.