Games won't launch on my new Windows 7 32-bit partition on an iMac.

Do other applications work?
Are you using steam? or something alike?
How did windows updates go? Any more recent updates?

Please post back with your results.

Can you also please post your specs?
System Info - See Your System Specs
Please follow the instructions ?
I will give you fresh sound and graphics drivers as they may be possible at fault here.

Also make sure to download DirectX. That's the essential you need for gaming. DirectX also comes with each PC version of the game that you can, and in most cases, NEED to install in order for the game to work.

The most important driver to update is, of course, the graphics driver, that's the only piece of hardware you must NOT keep on a generic driver from Windows Update. I assume the mac has an nVidia GPU, so just go to GeForce.com and search for the driver according to your graphics card and OS. If you use a 32bit Win7, you need the 32bit driver; naturally, if you have a 64bit Win7 you need the 64bit driver.

If you're not sure which one you installed, just right click the Computer icon and go to Properties. A window that will open will show you which version you have, so download the driver accordingly (and if the driver setup asks you to restart the computer, you definitely should).

From where did you get the sound/graphics card info? It looks like something I would read from the Device Manager...

If you're not sure which graphics card you have, go back to Apple and see if you can find the GPU according to the model you bought. You can't download the driver from nVidia until you know which graphics card you have... or, if it turns out you have an AMD/ATI Radeon, from ATI.

Gornot thanks for quickly replying, at least much faster than i do anyways.
Like he said you need to learn or figuere out what Specific Apple Model you have. We need to learn what graphics you have because at the moment your running basic drivers.

He mentioned that it was an iMac. Going to Apple's website, all the GPUs I saw were ATIs, that is, AMDs, whatever xD
But still, we need a confirmation from the OP.

You went to Apple's website eeeew!
I would never go there:P
Just kidding

Seems like he has HD 6XXX series
If Apple has been selling these same models at whatever time the OP bought it.

Well, good, Californian helper, since you have an ATI GPU as well you'll definitely point the OP towards the drivers easier than me. As an nVidia fanboy I've never even seen the ATI website in my life xD
It's not that I don't want to help, it's just that it's ATI lol

It's been a long night and I have right to make myself laugh