I have a friend who is experiencing this error anytime thye join a dayz server. Most public servers they can join, no modded servers but the error does appear on some public ones.

Deleting the game and re-installing, verify files, deleting all mods and fresh install of them.. none work and we have tried much more.

Is there any known fix to this or something different we can try?

The error that is displayed on the screen reads "Could not join server error 0x00010001 because it is unreachable"