Sure is only this: like in other posts, you always want the last word, thanks anyway for your kind replay
That's because I have facts that support this. There are more than 60000 messages in this board, and there are none reporting a similar issue. So, I repeat and confirm, if it's not a video driver bug, you are doing something different that what you are reporting.
If you are still not convinced, I'll be happy starting a Teamviewer session and check your system direct. PM if it's ok for you. And yes, you can write in italian with PM and Email...