Installed Firefox 4 yesterday, and now I'm unable to get online.

Installed Firefox 4 yesterday, and now when I try to get online I get this message: "Your computer must be restarted to complete a previous upgrade to Firefox. Do you want to reboot now?" I've rebooted numerous times and still get the same error message. Can't get online w/Firefox.

Run the Firefox program once as Administrator (right-click: Run as Administrator).<br />
If that doesn't help then do a clean reinstall.
Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* Firefox 4.0: http://www.mozilla.com/firefox/all.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
You do not need to create a new profile, that is not necessary for this issue
Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

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If you used a remove personal settings option from Windows or Firefox,you may well have permanently lost those bookmarks.
* Undelete<br>If you did that then timely use of a file undelete utility and a good helping of luck are likely to be required to attempt recovery (probably best to stop using
the computer entirely, until you have such utility).
*Your Own Backups<br>You could have a backup system in place that backs up such files or the firefox profile, and you may be able to use that.
* Synced to another machine<br> you may have the bookmarks synced on another machine, or even on an external server
**see [[what is firefox sync?]]
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Edit: Note to myself - submit answer immediately after typing it :)

Installed Firefox 4 yesterday, and now I'm unable to get online.

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