Еver there is a window

[Cen13]

Hello
For several months I have constantly appears a small window on top of any application. in the box there is no text, only the button ok.
Sometimes there is more than one. So far, so you will not close, nothing can be done.
I'm not sure, but I think this window has started to appear after the last firmware update.
He did a full system recovery, and the first thing I saw on the screen - it's a window.
Screenshot attached.
Phone: Xperia S (LT26i)
Android Version: 4.1.2

I hope to help ...

[Cen13]

Within two weeks window to appear once. If you run in safe mode, you have to wait long for a mistake ...
Any other suggestions?

[gwhispererz]

Frankly, it does seem like a software issue. Did you install any app lately which might be the cause of this problem?

Don't forget to mark correct answer as Accepted Solution.
If you find the post helpful, press Kudos.

[Cen13]

In a game of "Transport Tycoon Deluxe" disables the volume rocker, and this error may be because of her. Deleted. The window does not appear for a long time. If the window does not appear a week, I'll write.

[gwhispererz]

Great! Keep us updated.

Don't forget to mark correct answer as Accepted Solution.
If you find the post helpful, press Kudos.

[Cen13]

The window no longer appears. But now sometimes does not work the Volume Up button, volume down button has never failed. Restarting the phone fixes everything.
What could it be?

[gwhispererz]

Try repairing software again. If unsuccessful, send phone to your local Service Centre to have it checked, it could be a hardware issue.

Don't forget to mark correct answer as Accepted Solution.
If you find the post helpful, press Kudos.