At my current job I am forced to use Windows 7 and do not have access to a Linux virtual machine (I would prefer to use VirtualBox running Ubuntu on my local machine for access to Linux tools).
Instead, to get access to Linux style tools, I have to rely on Cygwin. Cygwin is a great project offering many tools for use within the Windows environment.
Percona Toolkit requires Perl, a common scripting language on Linux.
Thankfully, Cygwin provides a Perl interpreter which works well with the Percona Toolkit. You may need some additional packages installed, but this isn't too much hassle using the Cygwin setup program.