Hi Nick. This problem could occur due to software disabling the touchpad. Check your control panel in Windows for mouse controlling programs that may have options to disable the touchpad. In addition, the dv5-1125nr has the ability to disable its touchpad with a button directly above the touchpad. It's a small silver rectangle with a light next to it. If the light is on, the touchpad is disabled. If you're still having trouble, you may need to replace the touchpad. Check the repair guides for the dv5 on its device page, and look at the troubleshooting page if you need any more help.

Hi Nick, it sounds like you may have a hard drive failure on your hands. This is usually caused by old age or excessive movement dislodging parts inside the hard drive. Seeing as your Windows installation software can't find the hard drive, I recommend installing a new hard drive. Check out the hard drive installation guide in the troubleshooting pagefor the dv5.