The number keys to the right will not work, even after pressing number lock. suggestions?

Please open Device Manager and uninstall what is showing under "Keyboards". If you're unsure on how to perform these steps, follow this link:http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&dlc=en&docname=c03540049&lc=en&product=5450010&tmp...
Once you have uninstalled the keyboard driver, restart your notebook and it should automatically reinstall for you.
Let me know if this resolves the issue.

If the keyboard is not working in Windows, continue with these steps to uninstall and reinstall the keyboard software in Device Manager.

Click Start , then click Control Panel.
Control Panel opens.

Click Hardware and Sound.

Click Device Manager under Devices and Printers.

Device Manager opens.

Click View, and select Show Hidden Devices.

Double-click Keyboards, right-click the keyboard name, and then click the Uninstall button to remove the device from Windows.

Restart the computer.

The keyboard should now work correctly.

Your computer comes with several software programs that can test the keyboard for key or hardware failures. For more information, see the HP Support document Testing for Hardware Failures.

Notebook key presses are slow to respond
If there is a short delay from the time a key is pressed to the time the character displays on the screen, the Filter Keys function might be activated. The Filter Keys function provides a greater range of key press options to fine-tune key delays and prevent inadvertent key presses. To disable Filter Keys and return to the default keyboard behavior, use the following steps:

1. Click Start , and type keyboard in the Search box. Then select Change how your keyboard works under Control Panel.
2. Remove the selection from Turn on Filter Keys. Then click Set up Filter Keys.
   
3. Remove the check next to Turn on Filter Keys when SHIFT is pressed for eight seconds.
   
4. Click Apply, click OK, and then close the Ease of Access Center.
   The keys should be more responsive.

Pressing a notebook key once types several characters
If two or more characters appear when pressing a key, use the following steps to adjust the key repeat delay:

1. Click Start , and type keyboard in the Search box. Then click Keyboard under Control Panel.
   The Keyboard Properties page opens.
2. Set the Repeat delay slider to Long. Click Apply, and then click OK.
   

Notebook beeps while typing
If the computer sometimes beeps while you are typing, Toggle Keys or Sticky Keys is active. Toggle Keys causes the computer to emit a beep when the Lock keys are pressed. Sticky Keys causes the computer to emit a beep when the Ctrl, Alt, Shift, or Lock key is pressed. Use the following steps to disable Sticky Keys and Toggle Keys:

1. Click Start , and type keyboard in the Search box. Then click Change how your keyboard works under Control Panel.
2. If selected, remove the check next to Turn on Sticky Keys. Then click Set up Sticky keys.
   
3. Remove the check next to Turn on Sticky Keys when SHIFT is pressed five times.
   
4. Click Apply, and then click OK to return to the Make the keyboard easier to use page.
5. Remove the check next to Turn on Toggle Keys.
   If selected, remove the selection from Turn on Toggle Keys by holding down the NUM LOCK key for five seconds.
   
6. Click Apply, click OK, and then close the Ease of Access Center.
   The beeps no longer sound.

Wrong characters appear when typing, changing keyboard language, or Dvorak
If the wrong characters appear when you are typing, or you are trying to use a different keyboard, use the following steps to synchronize Windows to the type of keyboard you are using:

1. Click Start , and type region into the Search field. Click Region and Language from the search results.
2. Click the Keyboards and Languages tab, and then click Change Keyboards.
   
   The Text Services and Input Languages page opens.
3. Click Add.
   
4. Select the keyboard you want to use, and click OK.
   
5. From the Text Services and Input Languages page, select the new keyboard in the list and click Move up until it is first in the list. This makes it the default keyboard.
   
6. Click OK. You can now use the new keyboard.
   If you find that the new keyboard service works correctly and you do not want to use the other keyboard, repeat these steps and Remove the keyboard service that you do not need.
   

HP Notebook PCs Notebook Keyboard Troubleshooting Windows 7