On HP Laptops, sometimes F11 will get you into the recovery partition. However if this fails and you can still get into a runnable Windows you have an option. Run compmgmt.msc (Computer Management) in Windows and select Disk Management. Then mark the recovery partition (usually D) active by right clicking on the drive’s icon. Then restart. Don’t press any keys and if the partition is still good it should boot up the recovery partition so you can get your computer back to factory condition. This was verified on a HP Pavilion dv6000 series laptop.