I've installed Arduino 1.8.8 on Windows 10, and when I launch Arduino I get the following error message:
Could not write preferences file: C:\Users\Christophe\AppData\Local\Arduino15\preferences.txt (Accès refusé)
There seems some access rights issue to create the preference file as I get an access denied error. I tried to create an empty file in the directory, I've check if there where any access rights on the Arduino15 directory, I tried to launch arduino in admin mode, but nothing help.
Note that I got the same with Arduino 1.8.7 I tried to install last week.
I'm not installing the windows app version but he version available in download.
Any help would be welcome.