Also, can you boot into safe mode? If you can, go turn off Automatic restart. Start->right click on My Computer->Properties->Advanced->Startup and Recovery Settings button->uncheck "Automatically Restart"
If you can do that, you can read what the blue screen says, and we may be able to help more. I assume this is a clean install of windows and all that, and you said all the drivers are loaded, so do you know what was loaded right before it started this?
I have a similar problem. Mine is an re-install of a HD from an old system to a new one. I get a dos screen that says windows didn't finish loading and this may be caused by new hardware installation. It gives a number of options but all lead to a endless reboot. Nor can I boot into the XP install CD even if I disable booting to the HD. I just get the same screen. The blue screen flashes by too fast to read. Sorry if this seems like a hijack but I posted here because my problem is similar.