OPTION A: For home users with Win7 SP1 or Win8 installed, no-charge support for security updates (only!) is available by calling 800-MICROSOFT (800-642-7676) in the US or 877-568-2495 in Canada. [1]
For more information about how to contact your local Microsoft subsidiary [i.e., in other regions; e.g. the UK] for support issues relating to security updates (only!), visit the following Microsoft International Support website:
http://support.microsoft.com/common/international.aspx?rdpath=4
OPTION B: You may obtain Microsoft-sponsored Premium (i.e., paid) Support via the Answer Desk => http://answerdesk.microsoftstore.com [2]
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[1] This no-charge support is available in the UK but the phone call is not free IIRC.
[2] $49.00 USD for "up to one hour" of remote support from third-party techs (i.e., not Microsoft Support); fee must be paid up front;
no guarantees whatsoever!