07-31-2012 05:02 PM
If you own a recent notebook from the last two years with the UEFI environment installed it is pretty simple.
Press power button and start tapping the Esc key to access the startup menu. In th startup menu select the F2 key. That will invoke the HP Advanced System Diagnostics. Select BIOS management and in the BIOS management screen select BIOS Rollback.
BTW... it always helps if you provide us with the product name or product number of your notebook.
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2014 Microsoft MVP - Microsoft Windows Expert - Consumer