Another suggestion to try (originally from Vista):
NUM LOCK – CHANGE DEFAULT TO ‘OFF’ – via BIOS SCREEN
While powering up computer, QUICKLY, at START of Windows ICON screen, KEEP TAPPING the DELETE Key
With Right Arrow, go to ADVANCED
With arrow go to BOOT CONFIGURE
With arrow go to NUM LOCK
Hit Off
Hit F10 key to Save and Exit
System Manufacturer/Model Number HP Pavillion dv5t OS MS Office - Vista Home Premium x64 (SP2) CPU Intel(R) Core(TM)2 Duo Processor T9400 (2.53 GHz) Motherboard HP Memory 4GB DDR2 System Memory (2 Dimm) Graphics Card 512 MB NVIDIA GeForce 9600M GT Monitor(s) Displays 15.4" diagonal WSXGA+ High-Definition HP BrightView Widescreen Display Screen Resolution 1680 x 1050
Keyboard Built in - Synaptics TouchPad V6.5 on PS/2 Port Mouse Built in - Synaptics TouchPad V6.5 on PS/2 Port Hard Drives 320GB 5400RPM SATA Hard Drive with HP ProtectSmart Hard Drive Protection Internet Speed Turbo Other Info HP dv5t ~Vista 64 bit ~ T9400 2.53 GHz ~ 15.4 WSXGA+ 1680 x 1050 ~ 4GB DDR2 ~ 512MB NVIDIA GeForce 9600M GT ~ 320GB 5400RPM ~ Intel Next-Gen Wireless-N Mini-card w/Bluetooth ~ Blu-Ray ROM DVD+/-R/RW ~ Integ. HDTV Hybrid Tuner ~ 12 Cell Battery ~ MS Office 2007