If multiple files exist in the same directory, only the one with the highest number
is used because the most recent pattern file will have the highest number. There is
no need to delete the old pattern file or take any special steps to "install" the
new one. You can find the current virus pattern file, scan engine, and other files
on the Updates > Manual page.
Pattern files use the following naming format:
lpt$vpn.###
where ### represents the pattern version (for example, 511).
To accommodate pattern versions greater than 999, Trend Micro introduced an extended
internal versioning system:
roll number.pattern version.build number (format: xxxxx.###.xx)
-
roll number—represents the number of rounds when the pattern version exceeded 999 and could be
up to five digits (ranging from 0-42948).
-
pattern version—the same as the pattern extension of lpt$vpn.### and contains three digits (ranging
from 100-999).
-
build number—represents the type of pattern file and contains two digits (ranges from 00-99).
The minimum version number is 0.100.00 and the maximum version number is 42948.672.96.
