Here is an sha1sum for windows.
http://lists.gnupg.org/pipermail/gnu...q4/000184.html
Other alternatives:
Use a live cd and verify from there.
Or
Install cygwin and sha1sum.
I would use the link above though. If for some reason it doesn't come out the same, let me know before you trash the iso and I will try mine which I have verified on linux just to make sure there isn't any difference in algorithm.
nomb