AV Problem: fpc.exe, ppc386.exe and fpres.exe are often send by my avira installation to the cloud for checking. Specially after a make run. In this time the execution is blocked, after few second it is running again without a problem. This was trigger by the heurastic module of my AV-Prg.
So maybe other AV found this prg inside of the installer and block/delete this. In the past i had some trouble with Avira, but i sent them the files and it was accepted as positive false and the next releases are working without an issue. (BTW: I have an payed AV-Account).
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Have your AV an quarantine area ? If yes, look if you can unlock the file or sent to the AV, so they can detect a positive false.