Optiplex 790 - Mini Tower - Reformatted - Extracted all the drivers from the support site. 

NO Restore Method Used - FRESH INSTALL OF Windows 7 Pro 

All went well, except for a missing driver as shown in Device Manage: Code 28: SM Bus Controller - The drivers for this device are not installed

Installed This Chipset:

Intel_Chipset-Software-Insta_A02_R293337
Release Date:     4/19/2011
Importance:     Recommended
Version:     9.2.0.1019, A02

This is the only other Chipset for my Service Tag

ME7_Unified_SW_Installer_R311171
Release Date:     3/21/2012
Importance:     Recommended
Version:     7.0.0.1144, A02

I've checked and double checked the download site, can't seem to find anything else.

Thanx