Today solved 3 issues for my Windows 7 Installation.
1. Not able to ActiveSync with HTC-Touch – Solved by manually download and the Windows Mobile Device Center 6.1 from Microsoft web site. link
2. PCI Simple Communications Controller on HP dc7700 – Solved by download the Intel Host Embedded Controller Interface (HECI) Driver from HP support site and update the driver manually. link
3. PCI Serial Port on HP dc7700 - Solved by download the Intel Local Management Service (LMS) and Serial-over-LAN (SOL) Support from HP support site and update the driver manually. link