Is Automatic Updates enabled & working? Can you install any available
critical security updates offered at http://windowsupdate.microsoft.com (but
not IE8)?

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)? Were any of these applications running
in the background when you attemped to install IE8?

Has a Norton or McAfee application ever been installed on this machine
(e.g., a free-trial version that came preinstalled when you bought it)?
--
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Client - since 2002


ArcticFox wrote:
> I get the following error message when trying to install Windows Internet
> Explorer 8 in Windows XP. I'm currently running IE7. I checked the
> crytographic service and it is enabled and set to automatic.
>
> "Setup could not verify the integrity of the files needed for
> installation.
> Make sure the crytographic service is running on this computer."
>
> What should I do?