CP8 on Windows tablet : screens with caption are blurry (without it's perfect)

Hello Everybody,

We install an Captivate 8 on a Windows Tablet (HP / Win 8.1).

It works, we can record (it's better with the mouse than finger) but :

Screen recorded with a caption are blurry even if we toot away the caption in CP

Screen recorded wiith no caption are perfect

So  in a same movie (capture) : some screen are ok others are not

In a Desktop, we don't have the same problem.

Do you have same behaviour ?

Thanks in adavance