Hey there Snowflake! We appreciate you taking the time to reach out regarding that endless loop of scanning and updating the game. You are correct in presuming that this is not normal behavior with the App. This can be caused by a variety of things such as a conflicting third-party program, corrupted local files, or in rare cases a deeper problem with the Windows installation. Try the following to narrow this down a bit:
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Fully update or temporarily uninstall security programs which may be interfering with the Battle.net Desktop App. More information on troubleshooting security applications here, if curious.
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Once reinstalled, try clearing the “Indicies” for the game, which should force the Battle.net app to scan the game files and resume the update:
- Open the Blizzard Battle.net desktop app.
- Select the game in the list on the left.
- Click Options and select Show in Explorer.
- Open the World of Warcraft folder, and then open the Data folder.
- Delete every *.IDX file in the data folder (Note: Do not delete any of the Data.### files.).
- Return to the Battle.net app and click Options > Scan and Repair.
If you continue to experience issues, many problems related to your installation of Windows can be resolved by creating a new administrator account, logging into it, and trying the Battle.net Desktop App there.
If the game and App only work consistently on the new admin account, it means that the old account is broken or corrupted in some way. This is somewhat common, and the easiest fix is to move any user-specific files that you wish to keep from the old user account to the new admin account. You can also work with Microsoft’s Support to troubleshoot the problem with the old account if preferred.
I hope this helps! Let us know how it goes.