Firefox 11.0/12.0 does not launch and provides no error message, how can I fix this? Windows 7/8

Running Windows 7 on one partition, and Windows 8 Consumer Preview on another, Firefox does not open for either.
Firefox crashes upon opening without an error message. I have reinstalled and manually cleared profile information. If I create a new profile, it works until I close and try to relaunch requiring me to make a new profile.
I have tried removing/reinstalling java as well (just in case), as I had been editing some of the java installation from my Windows 7 partition.
As I launch the Firefox, if I watch the task manager, Firefox.exe appears for a moment, but disappears almost immediately.
No files appear in 'C:\Users\[Username]\AppData\Roaming\Mozilla\Firefox\Crash Reports' directory with the exception of the 'InstallTime*********' file.
*Information posted in the "Troubleshooting Information" section below is from the Windows 8 Consumer Preview partition. There are some errors with my display driver not being updated properly, but Firefox -was- working on Windows 8 Consumer Preview until just recently, so I am assuming that is not part of the issue.

Noah_SUMO,
Regarding Naomi Internet Filter, I verified that it was -not- something installed (I hadn't heard of it before, but I made sure nevertheless in case it piggybacked on something).
As far as system restore software, I keep none =x
Never have, and I change over OS's relatively often (I went from 7 this past fall to 7/Kubuntu/BTLinux, to 8DeveloperPreview/Kubuntu/BTLinux, to overwriting Kubuntu with 7 a few weeks later, overwrote 8DevPrev to 8ConsumerPreview, and then removed both linux partitions and remerged with a fresh install of two separate partitions for 7 and 8 (I help with some OS compatibility/stress testing for a friend's software development company).
As far as software that monitors or interacts with online connections..
Adobe Flash Player 11 Plugin, Apple Application Support, Apple Software Update, Bonjour, Google Chrome (not that it's preferred over FF, just over IE ;]), Java(TM) 7 Update 3, Microsoft Security Essentials, Microsoft Silverlight (I started having issues not long after I installed Silverlight, however I don't feel like this is causing any issue, as I tried removing it and reinstalling everything from scratch, but no luck), Mozilla Firefox 11.0 (x86 en-US)/Mozilla Firefox 12.0 (x86 en-US), Mozilla Maintenance Service, No-IP DUC (tested this and found no difference or ability for it to hinder FF), (previously) Skype 5.8, TortoiseSVN 1.7.5.22551 (32 bit), and WinSCP 4.3.7.
None of which I've found to have issues with Firefox in the past, as well as FF was working with them until just recently.
As far as I can tell, automatic updates were disabled for everything (including my OS), and no changes had been made to any of the software, with the exception of I had installed Silverlight, but as mentioned earlier, I didn't find any issues with this.
Like you say, my best guess at this point would be that there's something funky set up with my partitions, and so I may just do another fresh wipe and try again (it just takes forever to get everything installed that I need for school, so I'll probably just wait it out for a while).
The only reason in which I would go against it being a partition setup issue, is that it -was- working. However, I do recognize that something could have come up after a while (not sure how, but I don't doubt it).
I hadn't thought about downgrading past 11, but it's definitely worth a shot, and I'm more than willing to try. once I'm done with stuff today I'll give it a shot and post the results here.
Thanks so much for your suggestions.

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