Ran into a issue during OSD All machines were showing error "Bootmgr is missing" after OS deployment Found that the DHCP scope had lease set to only 5 minutes, causing the machine to lose IP during OSD. Changed the lease time in the scope to 24 hours and that fixed the issue. Also check : https://blogs.technet.microsoft.com/configurationmgr/2008/12/09/configmgr-2007-task-sequence-may-fail-to-run-with-error-code-0x80072ee7/ Hope this helps