[mattbrowntgp]

While trying to run non-Steam CS 1.6 on Arch Linux via Wine, I encountered a 'BadWindow (invalid Window parameter)' error, which relates to X11 issues. To fix it, ensure your Wine settings are correct, update graphics drivers, use an older Windows compatibility mode, consider a virtual desktop, and explore different window managers. Checking CS 1.6 files, using Steam, and consulting WineHQ can also help