Mozilla/Firefox 4 will not install on my computer and I cannot uninstall any old Mozilla/Firefox programs and files still on my computer.

Firefox won't load onto my computer. I have Windows 7, and each time I try to run the program to install it, it tells me I have another version still waiting to be installed that requires my computer to reboot. When I check "yes" to reboot, my computer reboots but still no Firefox. When I try to uninstall the the old Mozilla program from my Control Panels, there is no Mozilla files or programs listed not in my list of programs but when I go directly to the Windows File on the C: Drive, there's a Mozilla program file there. WHen I go into that file check, I attempt to open the uninstall program. I get an error message that says something to the effect of: "the version Mozilla on this computer is not compatable with my OS." Something about it being and 86bit program. My Firefox 3.6 worked fine 2 days ago. What's wrong???

Ok, lets do a couple of steps here first:
To make sure your windows isn't corrupted because of the power outage, let's run chkdsk.
Click on My Computer, then right click your C: Drive (if you have other hard drives, you will want to run this on them as well). Then, click Properties. Inside that window, go to the Tools tab. Inside that tab, open up the "Check Now" button. That will open a smaller window. Select the checkbox to "Automatically fix file system errors", then hit Start. You will probably receive an error asking if you want to schedule the disk check, click Yes, then restart your computer.
Read [http://support.microsoft.com/kb/315265 http://support.microsoft.com/kb/315265] for more information.
After running the chkdsk, then please go to [http://www.getfirefox.com www.getfirefox.com], and download a fresh version of Firefox. I'm assuming you are using Internet Explorer to download Firefox. Instead of hitting Run, let's try hitting save. Remember where it saves the installer file on your computer.
After the download has finished, double-click and run the Firefox install. Once it is finished, try to start Firefox up. Let me know how it goes!

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