lnsspikey

As another update, everything is now working as normal again. I decided to mess around with it a little more when I found out that Adobe Reader (yeah, I use it, so sue me) wasn't working properly in the old compatibility-mode Firefox. For future readers, I ended up also running a check disk (right click C: -> Properties -> Tools -> Error-checking) and the system file checker (a la here). I'm not sure which of those fixed my problems, but one of them did. Then you can set Firefox to run as normal again (right click FF icon -> Properties -> Compatibility -> Uncheck Run in compatibility mode). Thanks to all who chimed in with suggestions, and let this be a lesson to me and/or anyone else reading this: Always, ALWAYS make a backup of the registry before ccleaning it.

Update: I was able to get Firefox working again, by right-clicking the program link and selecting "Troubleshoot compatibility." It's not clear to me what exactly this did, but Windows went through some process, claimed to have found an incompatible setting of some sort, and fixed it. IE is still broken, which doesn't bother me so much since it never gets used. Unfortunately the "Troubleshoot compatibility" option doesn't exist when I right-click IE, and since I'm not sure what Windows did for FF I can't fix it for IE.

Yeah... saw that while perusing the forum to see if anyone else had this problem before posting. My lesson is learned. It only takes one time to mess it up, even if you've been diligent all the other times.

Hmm, Firefox Portable does the same thing as full Firefox. Could it be that there's something different about the way FF and IE render pages as compared to Chrome, that got messed up during the registry clean? Unfortunately (and inexplicably), the only system restore points available are from *after* the registry clean. When I get home, I'm going to try repairing Windows from my install disk, and will report back here if that fixes it.

I just ran a registry clean, as I have done at least a dozen times before, but this time somehow both Firefox and IE browsers are now completely broken - no page renders correctly, menus don't show up, no text is shown, etc (for example, here's google's home page: http://i.imgur.com/KOgvzcX.png). They are both completely unusable. Naturally I didn't make a registry backup this time, since I've done these exact same steps at least a dozen times without issue. I was able to install Chrome, which has never been on this computer, and it seems to work fine, but both browsers that were installed at the time of the registry clean are broken. I've tried uninstalling and reinstalling, creating a new Firefox profile (difficult when you can't see any menu text), starting in safe mode, re-running ccleaner to see what happens, and nothing works. Does anyone know what the devil happened? Barring that, is there a proper way of nuking Firefox completely and starting from scratch? (Since Chrome works after never having been installed, I'm working under the theory that if I can get a truly clean install, FF may live again)