Why did I get two MSN Explorer updates in a row?
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 Earlier versions of MSN Explorer (9.x through 10.2) are unable to upgrade directly to the latest version using the critical update process. When you attempt to sign into MSN Explorer using one of these versions, you will first go through the installation for version 10.5.  Once that install completes, the second critical update will launch which will upgrade you to the final supported version.