Thanks, but these drivers still doesn't solve the glitches. What's interesting is, when I uninstalled all the drivers, with the windows Basic Display Adapter (no driver) the graphics were fine, but, of course, unbearably laggy.
1) I have Acer Extensa 5630
2) It says I have Mobile Intel® 4 Series Express Chipset Family
3) Yes, installed 8.1 on formatted disk.
4) Yea, it looks the same no matter what I try to install.
5) No, before yours I had the default WDDM 1.1 driver.