>>>It depends what you have in QueryUnload or in Destroy events.
>>>Also, maybe the form is released, but maybe you have lock the screen refresh and after a while you unlock it?
>>
>>The last thing is may be possible. But I was unable to reproduce the problem now.
>
>If you can't reproduce it, maybe this is some process outside of VFP?
>Maybe some process takes so many resources that VFP can't refresh its own screen ;o)))
>Some backup running?

No backups running, but since I didn't reproduce the issue, I will not wory about it for now.