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Microsoft today released two new hotfix updates for Windows 10 Build 10049 users. The first one, KB3053902 comes with a fix for Outlook – Microsoft states:
After installing Windows 10 Technical Preview Build 10049, Outlook 2013 and Outlook 16 Preview might not index new emails. As a result, new emails do not appear in search results, and if you rebuild the index, no emails appear in search results.
Alongside KB3053902 (http://support.microsoft.com/en-us/kb/3053902/), Microsoft has also released KB3053898 (http://support.microsoft.com/en-us/kb/3053898/) which fixes the issues where some users weren’t able to enable Hyper-V on Build 10049 (http://www.windows8newsinfo.com/smf/index.php?topic=29264.0). Microsoft states:
You cannot enable Hyper-V after performing a clean install of Windows 10 Technical Preview Build 10049, nor after upgrading to Build 10049 from a build that did not have Hyper-V enabled.
Both of the updates are now live, and you can download it by going to Windows Update on Build 10049. Head over to this link to find out more about KB3053902 (http://support.microsoft.com/en-us/kb/3053902/) and this to find out more about KB3053898 (http://support.microsoft.com/en-us/kb/3053898/).
source:microsoft-news