1. Software and ownership
OptiWin is developed by Lý Quí Chung and published by 56KGen. Copyright 2026 Lý Quí Chung / 56KGen. All rights reserved. The application is licensed, not sold. Third-party components retain their own copyrights and licenses.
2. Free use
You may download and use OptiWin free of charge on computers you own or are authorized to administer. Donations are voluntary and do not unlock functionality. You are responsible for having permission to access files and change the settings you select.
3. Sharing the software
You may share the complete, unmodified official distribution without charging for the software. Preserve its embedded copyright notices and licenses. Do not present a modified package as an official release or imply endorsement by 56KGen. This agreement does not grant access to OptiWin's proprietary source code.
4. Third-party rights
Third-party licenses apply independently to their components. Nothing here restricts rights granted by those licenses or applicable law. Original notices are available in the application's Licenses page and on this website.
5. Changes, cleanup and recovery
Review scan results, selected settings, required privileges and confirmation dialogs before applying changes. Cleanup deletes files permanently. Configuration backups do not recover cleaned files or replace a complete system backup. Restore support varies by operation, and some recovery is manual. Keep independent backups of important data and only apply changes you understand.
6. Compatibility, warranty and liability
OptiWin is provided as is, to the extent permitted by law. Features depend on Windows builds, hardware, drivers and policies. Compatibility with every device, performance gains and successful recovery are not guaranteed. To the extent permitted by law, the publisher is not liable for indirect loss, lost profits or data loss arising from use. Mandatory consumer rights and liabilities remain unaffected.
7. Ending use and updates
You may stop using OptiWin by closing and deleting the application. This does not automatically undo Windows changes or delete local reports and backups. Restore supported settings first if desired. Update checks are manual; review the release information and applicable terms before replacing your version.