When trying to reset or uninstall I get a message saying I must reboot to complete installation of a previous version. Any suggestions?

After downloading v25.0.1, FF was slow. I have tried the reset, but it would give me the message that I must reboot to complete installation of a previous version. I tried to uninstall, but the version on the list was v 21. I received the same message when trying to uninstall it. I would like to update to v 25.0.1, but something is preventing the process.

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
Make sure that your security software (anti-virus) isn't blocking files and thus prevents Firefox from updating all files in the Firefox program folder.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 25: http://www.mozilla.org/en-US/firefox/all.html
Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.
*Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
*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.
*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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When trying to reset or uninstall I get a message saying I must reboot to complete installation of a previous version. Any suggestions?

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