You probably have an Intel video chipset which is not capable of playing the game. You would have to buy a new GPU (video card) and possibly some more RAM to play the game at any level. But you should post the entire dxdiag so we can see the rest. (Yes its long).
This is display devices.
Card name: NVIDIA GeForce 6100
Manufacturer: NVIDIA
Chip type: GeForce 6100
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0242&SUBSYS_101717AA&REV_A2
Display Memory: 256.0 MB
Current Mode: 1024 x 768 (32 bit) (60Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0010.9381 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 11/17/2006 03:29:00, 4541824 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
VDD: n/a
Mini VDD: nv4_mini.sys
Mini VDD Date: 11/17/2006 03:29:00, 3994688 bytes
Device Identifier: {D7B71E3E-4102-11CF-BF50-1D3003C2CB35}
Vendor ID: 0x10DE
Device ID: 0x0242
SubSys ID: 0x101717AA
Revision ID: 0x00A2
Revision ID: 0x00A2
Video Accel: ModeMPEG2_A ModeMPEG2_B ModeMPEG2_C ModeMPEG2_D ModeWMV9_B ModeWMV9_A
Deinterlace Caps: {335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(UYVY,YUY2) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(YV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
{335AA36E-7884-43A4-9C91-7F87FAF3E37E}: Format(In/Out)=(NV12,0x3231564e) Frames(Prev/Fwd/Back)=(0,0,0) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_BOBVerticalStretch
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
DDraw Test Result: Not run
D3D7 Test Result: Not run
D3D8 Test Result: Not run
D3D9 Test Result: Not run