Compaq/HP never shipped this machine with Windows XP installed hence they don't offer any support for it in Windows XP. It's has Intel® GMA 3100 Graphics/Intel® G31 Express Chipset for graphics (according to the specs page below.)
Compaq sg3640il specs:
And the motherboard is a MS-7525 (Boston)
OEM board. It's possible MSI will have drivers but I doubt HP/Compaq would allow them to distribute the drivers.
It doesn't appear that Intel has a Windows XP driver for the Video. This [url="downloadcenter.intel.com/Filter_Results.aspx?strOSs=All&strTypes=All&Produc tID=2780&lang=eng&OSFullName=All%20Operating%20Sys tems"] Intel® Desktop Board DG33BU[/url] uses the same video chipset and Intel only supports it in Windows Vista.
If you are unable to locate a XP compatible driver from Intel or Compaq, this software program should help:
To find make and model of pc hardware, EVEREST Home Edition is a free system diagnostics, system information program that will id most hardware onboard a mb. as well as the actual motherboard.
Alternate Everest download link: (offers 2 sites to dl program from)
Run the program and then:
Click on Computer
Click on Summary
Right hand window (hardware) if the text is BLUE
this is a link to the web site for that particular hardware.
If you have additional questions or need further help, please post a SUMMARY report from Everest.