I'm running the version of App Center and SIV that came on my board's CD. Works perfectly. Its prompts to update when I open App Center, but I just ignore since what I have does exactly what I need. I think you can see the correlation between what I suggested (rolling back) and what Gigabyte recommended... reinstalling windows. My suggestion is a lot less painful.
For future, you might want to consider making full disk image back ups after an install of windows. I usually make 3. 1 after install and activation (base), 1 after updates, and another after I've installed all of my software. These get shelved for as long as I own a board. It makes going back and recovering from problems or failures almost painless. I can completely loose my system and recover in about 8 min. Then going forward I make full disk image back ups about once a month. I keep 3 images at a time and rotate older images out every few months. Anything important is backed up to the cloud, as well as a second copy to an external disk connected to my NAS. So I always have at least 2 if not 3 copies of important data. There is no reason to sweat software or hardware failures. They happen. It also makes you less reliant on getting support from people who are usually more concerned about the initial sale than how you are doing during the warranty period.
