BIOS Driver

This may sound like a silly question...but where do I get a "Windows System
Management BIOS Driver" update? After much grief, I was finally able to get
my laptop to boot into Windows again. In Device Mgr, my problem is with the
Driver mentioned above. My problems started a couple weeks after SP2 update,
I used Recovery Console to reload Windows and got the following errors:
Device Installer Error-Windows could not load the installer for SDHost.
Contact your hardware vendor for assistance. And got the same for Bluetooth.
Windows continued to load which is how I was finally able to get into Device
Mgr and discovered the yellow dot with the '!' on Windows System Management
BIOS Driver.

That should be file
mssmbios.sys 5.1.2600.2180
System Management BIOS Driver
and goes here
C:\WINDOWS\SYSTEM32\DRIVERS
You should have a copy in the \windows\servicespackfiles\i386 folder