Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• Anti-Rootkit Utility - TDSSKiller
• AdwCleaner (for more info, see this alternate AdwCleaner download page)
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus built-in already.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

Note that the System Details List shows that you have multiple Flash plugins.

1. Shockwave Flash 21.0 r0
2. Shockwave Flash 22.0 r0

You can find the installation path of all plugins on the about:plugins page.

• http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins

You can check the Flash player installation folder for multiple Flash player plugins and remove older version(s) of the plugin (NPSWF32) and possibly (re)install the latest Flash player.

• (32 bit Windows) C:\Windows\System32\Macromed\Flash\
• (64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\

See also:

• http://blog.trendmicro.com/urgent-call-action-uninstall-quicktime-windows-today/

the-edmeister said

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of. You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• Anti-Rootkit Utility - TDSSKiller
• AdwCleaner (for more info, see this alternate AdwCleaner download page)
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Windows 8 has antivirus built-in already. Further information can be found in the Troubleshoot Firefox issues caused by malware article. Did this fix your problems? Please report back to us!

Thanks for the quick response, I have 2 malware programs on the PC Malware Hunter and Malwarebytes and neither have found any malware

I have AVG anti virus operating sys is windows 10 I will try the other malware programs to see if they find anything Many thks

Install the other recommended anti-malware applications. They don't all look for the same things and all should be available as free for personal use or as trial versions for a limited time or limited number of uses.

At this stage it seems to have worked your help is much appreciated Thank you