Thanks for the feedback. A year and a half ago I got a free copy of Mass Effect from Origin (before it was announced for PS3). I spent a day and a half researching and troubleshooting to get it to run, as I saw other people saying they were able to play it on their Windows 7 laptop with similar specs, but to no avail. So I've been reluctant to try any other PC games on it. Even much older ones.
GOG does have a 30-day money back guarantee that their games will work, but it doesn't cover if you don't meet the minimum system requirements. The trouble for me is, without an actual dedicated graphics card, I can't be sure if my Intel Media Accelerator thingy will be comparable to the minimum specs when given in graphics card terms. I'm sure I'll be OK with the 2000-era games like Fallout, Deus Ex, and System Shock 2. But browsing GOG, I'm getting tempted by newer games I've been hearing about, including Witcher and Indigo Prophecy (I just finished Heavy Rain).