Try the full installer. * https://www.mozilla.org/en-US/firefox/all/

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test to see if that helps. You can do a disk check with the chkdsk.exe program.<br /> If you run the chkdsk.exe program from a cmd.exe Command window then you can read the response from the chkdsk.exe program.<br /> Open a cmd.exe window:<br /> Start &gt; Run: cmd.exe &lt;press Enter&gt;<br /> At the command prompt (>) type or Copy&Paste: chkdsk.exe /f /r &lt;press Enter&gt; (put a space before /f and /r)<br /> If you get something like: Would you like to schedule this volume to be checked the next time the system restarts? y/n then answer the question with "Y" and close all programs and reboot the computer.<br /> ---- Do a malware check with some malware scanning programs on the Windows computer.<br> Please scan with all programs because each program detects different malware. Make sure that you update each program to get the latest version of their databases before doing a scan. *Malwarebytes' Anti-Malware:<br>http://www.malwarebytes.org/mbam.php *SuperAntispyware:<br>http://www.superantispyware.com/ *Microsoft Safety Scanner:<br>http://www.microsoft.com/security/scanner/en-us/default.aspx *Windows Defender: Home Page:<br>http://www.microsoft.com/windows/products/winfamily/defender/default.mspx *Spybot Search & Destroy:<br>http://www.safer-networking.org/en/index.html *AdwCleaner:<br>http://www.bleepingcomputer.com/download/adwcleaner/<br>http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml *Kasperky Free Security Scan:<br>http://www.kaspersky.com/security-scan You can also do a check for a rootkit infection with TDSSKiller. *Anti-rootkit utility TDSSKiller:<br>http://support.kaspersky.com/5350?el=88446 See also: *"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

The link to Mozilla for a full download worked great. Thanks!