Always state your full Windows version (e.g., WinXP SP3; WinXP 64-bit SP2; Vista SP1; Vista 64-bit SP2; Win7; Win7 64-bit) when posting in a forum or newsgroup. Please do so in your next reply.
What anti-virus application or security suite is installed and is your subscription current? What anti-spyware applications (other than Defender)? What third-party firewall (if any)?
Has a(another) Norton or McAfee application ever been installed on the computer (e.g., a free-trial version that came preinstalled when you bought it)?
See...
Windows Update error 8007f0f4 or FFFFFFFF:
http://windows.microsoft.com/en-us/Windows7/Windows-update-error-8007f0f4-or-FFFFFFFF
[@Jose: The toilet in Room 210 is broken.]
~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft