I found this on an HP forum:-
1.Right-click on "Computer" icon and select manage. 2.This will launch the Microsoft Management Console. 3.On the left side of the MMC, click on "Disk Management" and it will show you all of the partitions. 4.Right-click on the "HP Recovery" partition and select "Mark as Active Partition." 5.When the warning prompt appears, select "Yes" - Reboot and it will automatically boot into the Recovery Manager (without pressing F11).