Have you rebooted since installing IE7?
Required reading IMHO before installing IE7:
Sandi's Installation Tips <= Steps #1-8, #10 & #11; take note of #12, then
(ignore any references to Vista)
And I strongly recommend using
installation source, not Automatic/Windows Update.
Alternately, use this Direct Download link:
Tip: Save the installer to your desktop, do not Run it.
Make *certain* that you check in at Windows Update immediately after
installing IE7 and install any critical updates offered. If Optional
Updates category offers Root Certificates update, I recommend installing it
to take full advantage of IE7's additional security.
IEBlog : IE7 Installation and Anti-Malware Applications
What's New in Internet Explorer 7
IEBlog: IE and Windows XP Service Pack 3
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin http://aumha.net
> Have Win XP, SP 3 and installing IE7 and received the following message:
> Setup could not verify the integrity of the file Update.inf. Make sure the
> Cryptographic service is running on this computer.