[SOLVED][0.16.41] Unexpected error occurred

[Hotet]

I received the below error in a box directly upon starting the game.

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   0.000  Initializing Steam API.
   0.000  Error CrashHandler.cpp:522: Received SIGSEGV
   0.000  Error Util.cpp:67: Unexpected error occurred. If you're running the latest version of the game you can help us solve the problem by posting the contents of the log file on the Factorio forums.
Please also include the save file(s), any mods you may be using, and any steps you know of to reproduce the crash.
   0.000  Error CrashHandler.cpp:227: Heap validation: success.
   0.000  Creating crash dump.
   0.000  CrashDump success

I had to add

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cmd /k %command%

to the startup options to get the log above, as no new output were put into the log file, deleting them did nothing to change.

This occurred after accidentally starting an old version of Factorio (0.15.40 I think), and then realizing 0.16.x is the newest and installing that.

Specs:
OS: Windows 10
Gfx: AMD R9 200
CPU: i7-4790

[Jap2.0]

Can you upload the crash dump?

[Hotet]

Can you upload the crash dump?

There are seemingly none being produced. I assume the location is the same as the log files (%appdata%\Factorio)?

[Jap2.0]

Can you upload the crash dump?

There are seemingly none being produced. I assume the location is the same as the log files (%appdata%\Factorio)?

I believe so - that's strange, considering that the log says "CrashDump success"

[Hotet]

Can you upload the crash dump?

There are seemingly none being produced. I assume the location is the same as the log files (%appdata%\Factorio)?

I believe so - that's strange, considering that the log says "CrashDump success"

I found a most logical explanation for all this, although it does not explain how it came about though: The %appdata%\Factorio folder was marked as "Read only".