take into account the frequency of corrupted downloads...
Quite high .
Thats why its very important to test the 2142 installation in stages before and during the upgrade to FS. The one I noticed the most in troubleshooting the game recently was the number of bad downloads of the last incremental patch.
If you can launch the game at 1.2, then you can isolate the problem as being in the patch.
Dont reinstall your current downloaded patch, redownload it and try again, this worked twice today for noobs I brought in to the game that needed complete installs

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