Concatenate text files with Windows command line, dropping leading lines

Question

I need to concatenate some relatively large text files, and would prefer to do this via the command line. Unfortunately I only have Windows, and cannot install new software.

Answer 1

I would put this in a comment to ghostdog74, except my rep is too low, so here goes.

more +2 file2.txt > temp
This code will actually ignore rows 1 and 2 of the file. OP wants to keep all rows from the first file (to maintain the header row), and then exclude the first row (presumably the same header row) on the second file, so to exclude only the header row OP should use more +1.

type temp file1.txt > out.txt

It is unclear what order results from this code. Is temp appended to file1.txt (as desired), or is file1.txt appended to temp (undesired as the header row would be buried in the middle of the resulting file).

In addition, these operations take a REALLY LONG TIME with large files (e.g. 300MB)