SMC EFI Win8 and a whole lot of grief

I have a macbook air mid 2012 which until recently would dual boot either mac or win8.0  The grief started when I upgraded to win8.1.  Now all I get after a spinner thing is a blank screen.  Black or very dark blue.
Figured I should ensure that the firmware was up to date, I booted to the mac side.  Both the SMC and EFI are not current.
So I downloaded the current files and tried to install them but for either file I get an error
"Alert This software is not supported on your system"
Thoughts?
Now for a bit more detail....
I know the model is a mid 2012 model because I typed the serial number into the mac web site here
https://selfsolve.apple.com/agreementWarrantyDynamic.do
Also in "About this Mac" I get
Current MAC System Information:
Model Name : MacBook Air
Model Identifier:     MaBookAir5,2
Processor:                Intel core i5
Processor speed:      1.8GHz
Number of processors:  1
Boot Rom Version:   MBA51.00EF.B00
SMC Version(system) 2.5f7
Then on this page
http://support.apple.com/kb/HT1237
I am told the current (new) files for a  MacBook Air (13-inch, Mid 2012)  MacBookAir5,2
are these ones
MBA51.00EF.B02 (EFI 2.6)
2.5f9 (SMC 1.9)
So I downloaded the two files and clicked on them.
I get an error
"Alert This software is not supported on your system"
Is there a separate installer program I should use?
How does one do an EFI updgrade.
Any thoughts on the win8.1 debacle?
Thanks in advance

Open disk utility, and click on the internal drive.
Verify:
Partition Map Scheme : GUID Partition Table
http://support.apple.com/kb/HT2434

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