The classic client needs write access for local files, and protected installation folders can cause connection or update failures.
Steps
- Install or repair from the current official distribution and keep the client in a location where it can write patches and local settings.
- Reproduce the problem after a clean restart and record the exact error, action, client version, and whether the issue affects login, patching, display, or one character.
- Use official support for account or server problems and never send a password, registration token, or unknown diagnostic executable to another player.
Reference notes
Use the current official installer and place the client where the Windows account can write settings, patches, and screenshots. Protected Program Files permissions are a common update failure.
Try the official client cleanly before changing compatibility or administrator settings. Record the exact error, client version, install path, and whether the failure occurs before or after login.
Never solve a patch problem by replacing the executable with an unknown multi-instance or resizable client. Account and server-side problems belong in an official support request.

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