Image in CS6 is grainy at certain viewing percentage?

Hello, I'm wondering if this has happened to anyone else, but I'll be viewing an image in CS6 at lets say 28.44% and the image appears extremely grainy even though it is not. If I change the viewing size to 25%, it all goes away. When zooming in, some sizes are that ugly grain and others are normal! This just started happening last night with my CS6. Lightroom is still normal. Anyone have any ideas what could be causing this? It also only happens on my tif files or jpg files that have been sharpened and processed.

I would expect that if viewing at something like 28.44%. Generally, a whole # like 100/50/25 is recommended.

Always remember that the magnification is possibly waaay higher than the finished print will ever be.

I know exactly what you are talking about
https://photography-on-the.net …/showthread.php​?t=1367227

and unfortunately, I gave up on trying to figure it out. I got a desktop and use that now. Interesting I can have the same image opened on my desktop and on my laptop and the laptop is noisy while the desktop looks great. And it happened rather suddenly as it worked fine previously and I dont remember changing a thing. Even ACR and bridge show the images fine. It is just inside photoshop.

I hope you get this resolved