I just downloaded the trainer for No Man's Sky. It seems to be suffering from this Issue for me. I have tried running it in admin and everything found in the troubleshooting guide.
That is an unrelated issue and something on your PC blocking the trainers.
Any idea what it might be that is blocking it. It isn't my anti-virus or firewall because I have set exclusions for all of my trainers. The other trainers I have downloaded all work. The No Man's Sky one though acts just as described. It acts like it is going to load for a split second, and then nothing. Sometimes it doesn't even act like it is going to load I just get nothing. If it helps the machine I am on was originally a Windows 8 machine that was later updated to Windows 10.
Use the official trainer topic on the game board. Do not clog up this topic with other issues.