Hi,

Look on the bottom of the computer for model information.
Also Start - type in Search box -> System Information.
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Toshiba satalite c850d SM BUS drivers need >. Toshiba C855D Satellite SM Bus controller. This page contains the list of device drivers for Toshiba Satellite C855D-S5320. Realtek PCIe FE Family Controller: Driver Date: 2014. Toshiba Hotkey Driver. Download the latest drivers for your Satellite C855D. PSC7SU-007002) TOSHIBA. Oct 23, 2015 i have a toshiba satellite c855-s5206 the drivers for the Ethernet Controller, SM Bus controller, Universal Serial Bus Controller, and USB2.0.

Amd Toshiba Satellite C855d Drivers

Since the system originally had another version of Windows did you run the Upgrade Advisor and
check the Compatibility Center for the SD Drive (and other devices as needed).
Windows 7 Upgrade Advisor - please run this now.
http://www.microsoft.com/windows/windows-7/get/upgrade-advisor.aspx

Also check the Compatibility Center (for major devices)
http://www.microsoft.com/windows/compatibility/windows-7/en-us/default.aspx

Check with the System maker (Motherboard Maker for custom built systems) and the Device maker
for information about drivers for Windows 7. (BIOS, low level chipset drivers, and other major device
drivers). Toshiba does have a lot of help for upgrading most models on their website, check for your
model.
Check with Toshiba Support, their on-line drivers (to update or re-install), and their forums.
Toshiba - Forums
http://laptopforums.toshiba.com/
Toshiba - Contacts
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/navShell.jsp?cf=su_contact
Toshiba - Drivers - navigate to your model
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp?nav=Download
Toshiba - Support
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp
If needed : (these might not helps if the issue is drivers or Windows compatibility)

References to Vista also apply to Windows 7.
Do these to clear corruption and repair/replace damaged/missing system files.
Start - type in Search box - COMMAND find at top of list - RIGHT CLICK - RUN AS ADMIN
sfc /scannow
How to Repair Windows 7 System Files with System File Checker
http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html
Then run checkdisk (chkdsk).
How to Run Disk Check in Windows 7
http://www.sevenforums.com/tutorials/433-disk-check.html
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Then lets refresh the USB Stack

Control Panel - Device Manager - click anywhere in the blank/white area - then VIEW -
Show Hidden Devices
Now look everywhere EXCEPT USB Controllers for your device and if you find them (may have
more than one of each) under Disk Drives you may have several - RIGHT CLICK and UNINSTALL
for all instances.
Control Panel - Device Manager - USB Serial Controllers - RIGHT CLICK on EVERYTHING and
UNINSTALL all except the category itself - REBOOT - this refreshes the drive and the USB stack
This KB shows the XP how to and the Vista and Windows 7 methods are identical
http://support.microsoft.com/kb/310575

Sm Bus Controller Driver For Compaq

Here is a utility to help but do the above 1st.

USBDeview is a small utility that lists all USB devices that currently connected to your computer,
as well as all USB devices that you previously used. Run it Options and check the 1st three choices
to see if any are there.
http://www.nirsoft.net/utils/usb_devices_view.html
You would remove all instances of the devices then reboot.
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If needed try both of these :
Tips for solving problems with USB devices - and a Mr Fixit
http://windowshelp.microsoft.com/Windows/en-US/Help/c39bd203-f729-47a4-8351-83291e13c8a81033.mspx#EGB
Hardware devices not detected or not working - Mr Fixit
http://support.microsoft.com/gp/hardware_device_problems

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This might be helpful to determine if incorrect driver is loading.
DriverView - Free - utility displays the list of all device drivers currently loaded on your system.
For each driver in the list, additional useful information is displayed: load address of the driver,
description, version, product name, company that created the driver, and more.
http://www.nirsoft.net/utils/driverview.html
Hope this helps.

Tosiba Cs55d S5344 Sm Bus Controller Driver

Biostar Sm Bus Controller Driver

Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle - Mark Twain said it right.

Tosiba Cs55d S5344 Sm Bus Controller Driver