Looks like both of our computers have similarities such as the OS, almost the same vid card (yours is a slightly different model), exactly the same amount of RAM (I would guess yours is also a laptop). But there are enough differences to rule out any definite system issues. If you want the full DXdiag, let me know.
Well since I'm also a Vista user, I'll toss up my DXdiag info as well:
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System Information
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Time of this report: 4/8/2008, 19:20:58
Machine name: JJSCOMP
Operating System: Windows Vista™ Home Premium (6.0, Build 6000) (6000.vista_gdr.071023-1545)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Inspiron 1720
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A00
Processor: Intel(R) Core(TM)2 Duo CPU T7300 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 2046MB RAM
Page File: 1123MB used, 3183MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6000.16386 32bit Unicode
Display drivers:
Card name: NVIDIA GeForce 8600M GT
Manufacturer: NVIDIA
Chip type: GeForce 8600M GT
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0407&SUBSYS_01F21028&REV_A1
Display Memory: 1008 MB
Dedicated Memory: 241 MB
Shared Memory: 767 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: nvd3dum.dll,nvwgf2um.dll
Driver Version: 7.15.0011.5669 (English)
DDI Version: 9Ex
Driver Attributes: Final Retail