Excellent resource I found regarding optimizing the Intel GMA500, especially for Windows 8.1/10 (not officially supported by Intel). Posting the link (and backup archive.org link) here for future reference. I've also got backup copies of the drivers from the site which I'll eventually get around to hosting here.
https://gma500booster.blogspot.com/2012 ... ction.html
https://web.archive.org/web/20200130163 ... gspot.com/