Hi, I had a virus problem and during the erase process ( of the virus), I noticed this shadows/stripes when I open some pages or documents. It may be a problem with my graphics driver or it may not ?!?! I allready uninstalled adope flash player and installed the newest version.
In this screenshots there is a red square on the right, those shadows/stripes shoudn't be there, because on my laptop you can't see them: