What kind of issues did you have that made you uninstall Firefox? Do you have access to another computer that you can use to download the Firefox installer? You can find the latest Firefox release in all languages and for all Operating Systems here: *Firefox 15.0.x: http://www.mozilla.org/en-US/firefox/all.html Can you at least open that page via Google Translate (the Google cache still has 14.0.1)? *[http://translate.google.com/translate?hl=en&sl=fr&tl=en&u=http://www.mozilla.org/en-US/firefox/all.html] ---- Do a malware check with some malware scanning programs on the Windows computer.<br /> You need to scan with all programs because each program detects different malware.<br /> Make sure that you update each program to get the latest version of their databases before doing a scan. *http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware *http://www.superantispyware.com/ - SuperAntispyware *http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner *http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page *http://www.safer-networking.org/en/index.html - Spybot Search & Destroy You can also do a check for a rootkit infection with TDSSKiller. *http://support.kaspersky.com/viruses/solutions?qid=208280684 See also: *"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked