I'm sorry, however, I cannot reconcile your comment that the machine was really doing much of anything from the get-go, other than being slower than a dying snail.
The Nvidia NVS 3100M or Nvidia Quadro NVS 3100M is a business graphics card that is based on the GT218 core (e.g. GeForce G210M / 310M) but with drivers that are optimized for stability and compatibility in business applications).
Therefore, it is an entry level graphics card with low 3D performance that should be sufficient for low end games and demanding games in very low detail settings and resolutions. For example the old FEAR ran on a G210M in medium to high details fluently. Still, because of the "business drivers" and the slightly lower clock rate, the gaming performance of the NVS3100M may be worse.
A Geforce G.210 is pretty well just garbage for game playing.
Plants vs. Zombies Garden Warfare
Required: Internet connection required to install and play
DVD-ROM: N/A
OS: Windows 7/8 64bit
Video Card: NVIDIA 8800GT, AMD/ATI Radeon HD 5750
Processor: Intel Core 2 Duo @ 3.0 GHz
Sound Card: DirectX 9.0c
Compatible Memory: 4GB RAM
DirectX: 10.0+
Hard Drive: 15 GB
Input: Keyboard, Mouse or Dual Analog Gamepad
http://gpuboss.com/gpus/GeForce-GT-8800-vs-GeForce-210
