This can caused by a permissions issue when the
installer attempts to copy fonts between FSX and the Windows OS fonts
To solve the issue manually:
We've also recieved word that this issue can be
caused by disabling
the "Distributed Link Tracking Client" service, which is recommended by
many popular "tweaking" guides. We highly discourage any disabling of
Windows services. The performance gain is negligible at best and at
worst you run the risk of causing strange issues such as this one.
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