Since Microsoft Said that they will release the Windows 7 RTM build to the public in October 22nd, but before that they promised to release it to the TechNet community. What if you are not part of the TechNet community and could not wait?
Well here are some links for you to download the original untouched Windows 7 RTM (build 7600) ISO. But after downloading always make sure you check the file hashes accordingly to make sure that they are indeed unmodified and untouched.
Check the Win 7 Hashes Here use a hash checking application. We recommend HashTab.
