For windows installations of PHP, PEAR does NOT come installed. Reading through the documentation, it looks like you can just click go-pear batch file in the directory where PHP is installed. However, I have come across errors with this both times I have tried to use it. The method I found successful is to open a windows command prompt and move into the directory where php is installed (that's assuming you know the change directory command "cd" to move through directories). Once there, issue "php -r "readfile('http://pear.php.net/go-pear');" > go-pear" to grab the latest instructions and save the file to go-pear. Then, issue "php go-pear" to install PEAR on your windows box. It will ask you a series of questions, which should be fairly easy to answer. Finally, it will create a file in your php directory to update your environment variables. Double click on this file to add PEAR to your path, and you can start using it!