I received a message to upgrade my Firefox version . It went to successful completion but I get a message unable to find proxy server?

After updating to latest version of Firefox i am unable to access internet. Get message Unable to find proxy server. This update also disable internet explorer so I cannot use it to access either. The desktop that I am having trouble with is running Windows XP Professional.

hi, please check in the firefox ''menu ≡ > options > advanced > network > connection - settings...'' if firefox is set up to directly connect to the internet ('no proxy').
and maybe also run a full scan of your system with the security software already in place and different tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes], [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] & [http://www.kaspersky.com/security-scan kaspersky security scan].

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