Major SM Bus Controller Issue - Dell Optiplex 790

This is an updated. I installed the " Intel Chipset DriverIntel Chipset Driver " and the SM bus controller error went away. However, I have two unknown USB devices that are unrecognized in the device manager. Windows can't find drivers for them. I tried uninstalling and rebooting PC, but this doesn't help. They come back as unrecognized. I am also not able to plug in an USB devices because none of the are recognized and the computer doesn't attempt to look for them...

SM Bus controller is ALWAYS chipset drivers were not installed.

Either you have USB based malware or you damaged the registry.

http://downloads.dell.com/published/pages/optiplex-790.html

• Description	Supported OS	Download
  Intel Management Engine 7.1 Components Installer This package provides the Intel Management Engine 7.1 Components Installer and is supported on the Precision, OptiPlex and Latitude models that are running the following Windows Operating Systems: XP, Windows 7 and Windows 8.More details	Windows 7 32-bit Windows 7 64-bit Windows XP x64 Windows 8 32-bit Windows 8 64-bit Windows XP
  Intel Management Engine 7.1 Components Driver This package provides the driver for Intel Management Engine 7.1 Components Installer and is supported on Latitude, OptiPlex and Precision are running following Windows Operating system: XP, Windows 7 and Windows 8.More details	Windows 7 32-bit Windows XP Windows 8 32-bit Windows 8 64-bit Windows 7 64-bit
  Intel Management Engine Interface Driver This package provides the Intel Unified AMT 7 Management Interface Driver and is supported on the Latitude, OptiPlex and Precision models that are running the following Windows Operating Systems: XP, Vista, Windows 7 and Windows 8.More details	Windows 7 32-bit Windows XP Windows 8 64-bit Windows Vista 32-bit Windows XP x64 Windows Vista 64-bit Windows 7 64-bit Windows 8 32-bit
  Intel Unified AMT 7 Management Interface Driver This package provides the Intel Unified AMT 7 Management Interface Driver and is supported on OptiPlex and Precision that are running the following Windows Operating Systems: XP, Vista and Windows 7.More details	Windows 7 64-bit Windows XP Windows XP x64 Windows Vista 64-bit Windows 7 32-bit Windows Vista 32-bit
  NEC USB 3.0 Driver This package provides the NEC USB 3.0 Driver and is supported on OptiPlex, Precision and Latitude models that are running the following Windows Operating Systems: XP, Vista (32/64-bit) and Windows 7 (32/64-bit).More details	Windows Vista 64-bit Windows Vista 32-bit Windows 7 32-bit Windows XP x64 Windows XP Windows 7 64-bit
  Intel Chipset Driver This package provides the Intel Chipset Driver and is supported on OptiPlex, Latitude and Precision models that are running the following Windows Operating Systems: XP, Vista (32/64-bit) and Windows 7 (32/64-bit).More details	Windows XP Windows Vista 32-bit Windows 7 64-bit Windows 7 32-bit Windows XP x64 Windows Vista 64-bit
  Intel Unified AMT 7 Management Interface Driver, v.7.1.0.1028, A00 Intel Unified AMT Driver, 7.1.0.1028 PV 5MB SKUMore details	Windows XP Windows Vista 64-bit Windows Vista 32-bit Windows 7 64-bit Windows 7 32-bit Windows XP x64

• Type: Utility

  Description	Supported OS	Download
  Intel Identity Protection Technology Driver This package provides the Intel Identity Protection Technology Driver and is supported on Latitude, Precision and OptiPlex models that are running the following Windows Operating Systems: XP, Windows 7 and Windows 8.More details	Windows 7 64-bit Windows 8 32-bit Windows 7 32-bit Windows XP Windows 8 64-bit
  Intel Identity Protection Technology Utility This package provides the Intel Identity Protection Technology Utility and is supported on OptiPlex, Precision and Latitude models that are running the following Windows Operating Systems: XP, Vista, Windows 7 and Windows 8.More details	Windows 8 32-bit Windows 8 64-bit Windows 7 32-bit Windows 7 64-bit Windows Vista 32-bit Windows Vista 64-bit Windows XP
  Intel Identity Protection Technology Utility This package provides the Intel Identity Protection Technology Utility and is supported on Latitude, OptiPlex and Precision models that are running the following Windows Operating Systems: XP, Vista and Windows 7.More details	Windows Vista 32-bit Windows 7 64-bit Windows 7 32-bit Windows XP Windows Vista 64-bit
  Intel Identity Protection Technology (IPT), v.1.0.71 PV, A00 Intel IPT Middleware/API 1.0.71 PVMore details	Windows Vista 64-bit Windows XP Windows Vista 32-bit Windows 7 32-bit Windows 7 64-bit

If the registry is damaged, what can I do to fix it?

Thanks for your suggestions so far. The drive seems to work pretty well so far. The only thing that doesn't show in my Serial Bus Controllers is the USB Composite Device Driver. I don't know where I can possibly install it from. It doesn't appear to be a stand alone driver. Can I install this driver somehow, or is it part of some package?

You don't fix it.  You buy a new hard drive and a USB to Sata wire.  Reinstall everything on a new blank drive and use the usb wire to recover data from the old drive if possible.  Sometimes the drive is too far damaged to recover anything.  You can get ontrack data recovery to do it but it costs $350 for diag and $3500 for recovery.  They recovered data from a space shuttle hard drive that fell from the sky,

http://www.apricorn.com/products/notebook-hard-drive-upgrade-kits/drivewire-ide-pata-sata-to-usb-hdd-adapter.html?type=family&id=39

Speedstep gave you links to all the drivers in a previous post.  You can also find them here under Chipset. Be sure the OS is set to Win 7 at the top of the page before downloading them.

You probably should update all of them...

However, I have two unknown USB devices that are unrecognized in the device manager. Windows can't find drivers for them.

I set up a 790, but I don't remember what I had to do for the USB devices. It may be that Intel USB drivers need to be installed. If you use the device IDs displayed in the Device Manager properties, you may be able to find the appropriate drivers.