Handle competing fontconfig installation

[zomborid]

Issue #629 mentioned MiKTeX failing to open fontconfig on Windows.
The error stated Fontconfig error: Cannot load default config file.
Reinstall of MiKTeX did not resolve it.

I found a strange env variable: FONTCONFIG_FILE="C:\Windows\fonts.conf"
Since the file did not exist I tried to delete the env variable, and magically latex works now.

The probable cause is that I installed MiniTool MovieMaker and OBS Studio, and one of them created the erroneous variable.

(Since comments on the original issue are not allowed, I opened a new one to document my finds. This issue can be closed I think.)

[edocevoli]

Thank you for the info. Maybe this should be logged.