I will give you a direct download link for now, which would probably make things easier:
http://d1h4xl4cr1h0mo.cloudfront.net/v1.6.8/x86_64-pc-windows-msvc/InstallParity.exe
Alternatively, you can edit your windows host file as an Administrator (usually C:\windows\system32\drivers\etc\hosts) and add a line 178.62.0.101 parity.io or access the website using the ip address directly, http://178.62.0.101
For future readers, please note the IP address listed may be subject to change. This was posted on July 3rd, 2017
RE: SyntaxError: Unexpected end of JSON input - Using MetaMask with EOS Token Distribution