Windows has a built-in command called FC to compare files?
1) Open command prompt.
2) Execute "FC FILE1.txt FILE2.txt"
FC supports additional parameters:
/A Displays only first and last lines for each set of differences.
/B Performs a binary comparison.
/C Disregards the case of letters.
/L Compares files as ASCII text.
/LBn Sets the maximum consecutive mismatches to the specified
number of lines.
/N Displays the line numbers on an ASCII comparison.
/OFF[LINE] Do not skip files with offline attribute set.
/T Does not expand tabs to spaces.
/U Compare files as UNICODE text files.
/W Compresses white space (tabs and spaces) for comparison.
/nnnn Specifies the number of consecutive lines that must match
after a mismatch.
Specifies the first file or set of files to compare.
Specifies the second file or set of files to compare.