On HP workstations and laptops that use high-density (750GB-1TB) hard drives and are running Windows, older versions of the Intel Rapid Storage Technology driver can cause various problems including the inability to run Windows Update.
The error message will state that the Windows Update service is not started, but if you check it, it is running.
The solution is to download version 188.8.131.521 (software package SP47845) or newer of the Intel Rapid Storage Technology driver from HP's support website.
If you need help with this or any other support issue, please don't hesitate to contact me at the ALI Technical Assistance Center at (540) 443-3398.
Advanced Logic Industries
Technical Assistance Center (TAC)