If you must keep the GMA 3100, disconnect the PC from the internet after installing essential apps, and use it as an offline workstation.
However, there is a crucial distinction: The GMA 3100 (G33) is the same as the GMA 4500. The 4500 has official Windows 7/8/10 support; the 3100 does not. Do not attempt to install G45/X4500 drivers on a G33 chipset, as this will result in a black screen or boot failure.