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I tried to upgrade Firefox and now I'm stuck in a loop

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I tried to upgrade to FF4 and my computer froze during installation. So I rebooted and tried to upgrade and it said I needed to reboot to complete an uninstall of a revious version. I did that 3 trimes. I was also unable to just open FF. Then I uninstalled FF completely and tried again, but I'm still getting the reboot message.

I tried to upgrade to FF4 and my computer froze during installation. So I rebooted and tried to upgrade and it said I needed to reboot to complete an uninstall of a revious version. I did that 3 trimes. I was also unable to just open FF. Then I uninstalled FF completely and tried again, but I'm still getting the reboot message.

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See:

Remove the files in the updates and updates\0 folder.
You may need to delete active-update.xml and updates.xml as well if present.

C:\Documents and Settings\<user>\Local Settings\Application Data\Mozilla\Firefox\Mozilla Firefox\updates
(%USERPROFILE%\Local Settings\Application Data\Mozilla\Firefox\Mozilla Firefox)