jaylach wrote:
If all three are yes it is probably caused by the ATI tray icon. This is an old issue that was associated with Windows XP and I'd be surprised that it still happens.
Googling "windows 10 white box on desktop" seems to confirm that this still happens for a variety of reasons and it appears to span all releases of Windows including XP,7,10. Most likely due to poor coding.
Looking at the search engine results it appears there isn't a 'one fits all' solution and that to resolve the issue you're going to have to do your own investigations
Personally, I'd start with restoring my pc to a time before this first appeared, System Restore or a Backup, the choice is yours... if that isn't an option or it doesn't work I'd think about rolling back or uninstalling any driver updates I'd installed, this would include any Windows Updates I'd installed but I'd save them as my second option.
If that still failed then I'd run msconfig:
From Start Menu > Run (is it still there in Win 10?), enter "msconfig" and select the Services tab (check Hide all Microsoft services) and disable each service one by one, rebooting after disabling each service, if disabling any service doesn't work then enter msconfig again and re-enable the service you previously disabled, reboot, try again with the next service.
When you've narrowed down the cause then at least you'll know what's causing the box to appear and you can make a decision what to do next... put up with it pending an update, rollback to an earlier version, contact the vendor, etc.
