Boot failure in B50-30 Touch after BIOS update

Hi,
I bought a B50-30 Touch notebook 2 months ago in the United States.
Just before my visit to India, I updated the BIOS from version 2.04 to 2.07.
Now I am unable to successfully boot into the factory-installed Windows 8.1.
The Lenovo logo appears & the system gets stuck in a restarting loop.
I reset the BIOS to the system default settings, but still failed to boot successfully.
Even using the Novo button for system recovery results in an endless restarting loop.
Kindly let me know if there is any way I can flash the BIOS back to version 2.04 using an USB flash drive.
I have executables of both versions 2.04 & 2.07 of the BIOS update utility:
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/ziwb0207.exe
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/ziwb0207.txt
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/ziwb0204.exe
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/ziwb0204.txt
Any help in this regard would be greatly appreciated.
Waiting till I return back to States after 3 months is not a pleasant option.
Solved!
Go to Solution.

Andrew_Mitchell wrote:
That's a lot of useful info!
However it appears that you did not understand what I said about the Linux Live USB.
I was actually not successful in being able to view any of the partitions or files on the HDD.
Only the folders & files created by the Linux Live USB installation could be seen.
This is worrying as some of the stuff on the HDD needs to to backed up.
So I think it is a risk to proceed further before making sure that the data on the HDD is intact.
Also, another thing I would like to state is that the system (C) partition has nothing of value on it.
All the data that I need to backup is on the D: partition.
So if your instructions risk losing only the contents on the C: partition, then it is fine with me.
I can go ahead & try to repair the installation.
Please clarify this in order for me to proceed further.
As always, thanks a million for your help.
It is greatly appreciated.
PS I always make sure that I know what I am doing before tinkering with a system.
I understood your reference but I was indicating that the hardware was working, not inferrring the data was readable. If it came up with no hard disk installed under linux it would have been a different story. I apologize if this caused confusion.
There is always a chance that data will be lost with any change to partition information, that is why I always suggest making a back up if possible. If you can not see the data on the partitions, the best way is to use GParted and TestDisk to view the contents of the hard disk with both quick scan and deep scan options. Using this will not make changes to data, only allow you to see what TestDisk can say is there. If you look at TestDisk walkthru you can see it does not make changes unless you "write" or commit your changes to the drive.
If TestDisk shows you the partitions information it will include all that are "marked" for deletion or corrupted. It can give you options to view partition contents (raw data) to verify the proper partition to recover and then make it active. It can also restore boot sectors as well.
Windows RE will attempt to do this, but if it fails you will have little choice but to initialize the drive and start over.
PS> I figured you knew to look before leaping, but better not to assume... LOL

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