Hello!

After seeing the screenshot you posted, I have to say that I'm quite baffled.

For setting the system paths, if you selected the option for Maya to set the system path during the install, you should be fine... and your screenshot shows that Windows knows where Maya is as there are no error messages.

After looking at the .bat file I can also see that there is nothing in the file itself that can cause this.

I think we can rule out the .bat file here. Since upgrading from Maya 5 to 7 is a pretty big leap, it is possible that the command for rendering has changed or requires further input from the .bat file to start properly. However I would not know about this as I use 6.5 Unlimited. Anyways, it can also be Windows itself.

I hope you don't need those renders desperately...