The onboard graghics for this board are not the greatest for Windows 7. You think about upgrading to a PCIe x16 card.
I personally had the D101GGC board in a eMachine W3502 computer. It didn't take long for me to come to the conclusion that the graphics was glitching. I purchased a Radeon 4350 card for $45 and have had no issues. I no longer have that system but still using the same graphics card.