Invalid signatures installing itunes 10.6.1

I cannot update to itunes 10.6.1, due to invalid signatures, have 10.5.3.3, using hp laptop running windows 7, tried switching off firewall, also allowing invalid signatures in IE advanced settings but still having same problem. any ideas what to try. Thanks

Does it make a difference if you use Firefox instead of IE to do the download?

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    Try this solution from Katrina :
    Katrina S.
    Posts: 20,498
    From: USA
    Registered: Dec 27, 2004
    Re: iTunes 8.2 has in invalid signature?
    Posted: Jun 21, 2009 1:13 AM in response to: cfrolich
    Click to reply to this topic Reply email Email
    Try going into IE > Tools > Internet Options > Advanced tab
    Scroll down to the security section
    Put a check in the box for "Allow software to run or install even if the signature is invalid"
    SAVE the iTunesSetup.exe, it's a bad idea to run installs over the internet.
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    "Safari 5" has an invalid signature. It will not be installed.
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