Re: The Sims 4 rainbow glitch
@MissCSimming Are you seeing any other anomalies in your game? Your dxdiag lists crashes of Dell's Alienware Command Center as well as Nahimic, which is audio enhancement software. But problems with those would more likely crash your game or cause lag or freezes, not an isolated graphics glitch with the Gallery. And the dxdiag doesn't list when the crashes happened, so they might have nothing at all to do with Sims 4.
I asked around, and the two people who recognized the images you posted and weighed in said that this issue was usually solved with either a computer restart or by clearing the cache files in the Sims 4 user data folder. There are a few different files and folders inside, not all of which have to do with the Gallery. Here's a full list, along with explanations of what they're for:
https://sims4.crinrict.com/eng/2014/09/user-files-explained/
Try deleting all the ones that are related to the Gallery or online connectivity, restart your computer, and have a look. If the images are still glitchy, quit and restart without deleting the cache files, and see what happens. (As in, give the game a couple of tries at rebuilding the data using the same cache files.)
If that doesn't help either, try clearing Origin's cache as well as your browser caches, including the one for Internet Explorer. Even if you never use it, Origin does for some purposes. Be sure to uncheck the box to preserve data for favorite sites.