Hi katfro :)
One of your corrupted file was indeed repaired by SFCFix. As for the two others, they are false positives. SFC reports them as corrupted when they aren't. Microsoft is aware of the issue and said that they'll address that issue in a future update. For more information, read the article below.
https://support.microsoft.com/en-us/kb/3022345
This update contains the following files that are occasionally updated by the Diagnostic Tracking Service:
telemetry.ASM-WindowsDefault.json
utc.app.json
The two files are marked as static files in the update. When an advanced user runs the System File Checker Tool (sfc.exe), the files are unintentionally flagged as corrupted. There is no impact or actual corruption on a device running this update, and a later service update will resolve this issue.
This being said, your GTA V crashes aren't caused by these two files, the issue lies somewhere else.
