Since your Box Excel files preview fine on other devices but not on your laptop, the issue is likely local to that machine. First, ensure your laptop’s internet connection is stable and that the Box app or Box Drive is running and fully synced. Clear the cache for both Box and your browser, and try downloading the files directly to open in Excel to rule out preview or integration issues. Check that Excel is updated, set as the default program for .xlsx files, and that there are no conflicting Office versions installed. Also, verify that Box and Excel have proper permissions on your laptop (especially on macOS or with Windows admin rights). If problems persist, try repairing or reinstalling Box Drive and Excel. Finally, note any error messages during attempts to preview or open files, and consider any recent system changes or updates that might have triggered this.