Resolved - AWS have resolved the issues.
Investigating - AWS has intermittent DNS Resolution Errors. This is affecting installation/downloading of packages including installing Chocolatey itself from the community package repository. Please watch https://status.aws.amazon.com/ for updates.
We are sorry for any inconvenience this may cause you. This incident post will be updated once we have more information.
Also watch https://github.com/chocolatey/chocolatey.org/issues/721 for updates.