windows 7 screen resolution

[PALEHORSE]

I dont know wtf is going on. I been running my comp normally. i downloaded an old school game and the graphics glitched like rainbows. ok. so i right click screen resolution and let that run in the background. now the game runs in HD, everything else is running crisp and more defined then before too, just by letting that run in the background. wtf is that?

[check two]