Try turning on HTTP 1.1.
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Open Internet Explorer.
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Go to Tools->Internet Options and click on the Security tab.
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Click Trusted Sites and then click Sites.
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Clear the Require server verification (https:) for all sites in this zone check box
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Type *.windowsupdate.microsoft.com in the Add this Web site to the zone box, and then click Add
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Type *.windowsupdate.com in the Add this Web site to the zone box, and then click Add
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Type v4.windowsupdate.microsoft.com in the Add this Web site to the zone box, and then click Add
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Type download.windowsupdate.com in the Add this Web site to the zone box, and then click Add
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Type windowsupdate.microsoft.com in the Add this Web site to the zone box, and then click Add
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Click OK twice.