Downloaded both the x86 and the x64 version 5.0.2. Both are rejected by Windows 10 as not valid Windows installers. Tried re-downloading several times with the same result. Had to reinstall version 4.4.4 x86 which installed perfectly.
Sounds weird and obviously most people are able to install just fine. Maybe you could try downloading via the torrent link? The file integrity might be verified better that way.
Ken, a long time has passed, I'm closing this bug report. Set the status back to UNCONFIRMED if you're still experiencing this issue with the latest release.