FreeSurfer may be run on Windows via the VirtualBox applicaion.
VirtualBox is supplied by Sun Microsystem.  You should first
install that on your Windows system, downloaded from here:

http://www.virtualbox.org/wiki/Downloads

Choose the 'x86' download for Windows.

Then you should extract the file 'FSVboxVDI_PPJ.rar', which
extracts three files:

  freesurferVbox.vdi
  README.txt
  PASSWORD.txt

To extract the .rar file, you might need to get the 7-zip 
utility from:

http://www.7-zip.org

Once the files are extracted, then use the VirtualBox Wizard
to select freesurferVbox.vdi as the 'hard disk image'.
Later, you will be prompted for a username and password,
which is included in the PASSWORD.txt file.

Once you are able to open a terminal, then you will need
to make the following patch:

cd /usr/lib
ln -s libtiff.so.4 libtiff.so.3

After which the freesurfer installation should work as
it would on a Linux Ubuntu system.