Thank you Yoyodu77, it's very kind of you to enlighten me a bit. I downloaded pdf24 as you suggested. A great software and moreover free. But after trying, nothing to do. I think that the problem comes from elsewhere, I have seen immediately on the internet. I didn't have this kind of problem before; if you look at my profile, you'll see that I'm not at the beginning. I'm doing everything I can to fix it, but I'm pulling my hair out, believe me it's annoying. Thank you for your intervention; I am happy to see that someone is trying to help me. It's great ........