Error Running PEAR On Windows

Problem:
I went to verify phpunit installation on my windows machine and found that when running pear.bat, I was met with the following:

$ pear.bat
./pear.bat: line 1: @ECHO: command not found
./pear.bat: line 3: REM: command not found
./pear.bat: line 4: REM: command not found
./pear.bat: line 5: REM: command not found
./pear.bat: line 6: syntax error near unexpected token `('
./pear.bat: line 6: `REM Copyright (c) 1997-2010 The Authors'

Solution:
Reading the PEAR Documentation, I found that the program had to be 'run as Administrator'. Doing this allowed me to upgrade pear and then install phpunit.