I have this problem with Adobe Reader DC, where it always produces those artifacts, shown in the pictures, when I click into the text. Upon opening the document everything is fine. But when I click to e.g. copy and paste something it makes the text unreadable. Scrolling out of the corrupted part fixes the problem, but only until I click again.
Maybe someone can help me. I newly installed it serveral times. Have no clue, what could cause that error.
Greetings and Thanks
Hope you are doing well and sorry for the trouble. As described you re getting the black and white dots when you click on the PDF file.
Please check out the correct answer marked in a similar discussion - https://community.adobe.com/t5/acrobat-reader/screen-turns-to-black-and-white-dots-using-adobe-acrob... and see if that works for you.
Thanks for the quick reply. Running Adobe Reader DC ins Win7 Compatibility-Mode works for me. 🙂