UEFI BIOS HP Pavilion

I have a HP Pavilion Seris model # p7-1423w

I'm trying to access my BIOS to activate the virtual machine mode.  I followed all the instructions I have found here and on the web, I got to the point where I restarted in the menu of UEFI, then my PC just rings 4 times light is yellow/orange color, then the light turns blue and the screen is blank.  If I manually stopped by using the power button I resart and it once again, on the third restart it goes to windows normally and I never have an option to access the BIOS.

I suspect it has something to do with a tip legacy, but not sure, please help.

Hello

You indicated that you use Windows 8.1.  However, Hyper-V is no longer available and the Pro and Enterprise versions.  Want to tell you this information.

You mentioned the power on light flashed 4 times. This means according to the diagnostic codes you have a power supply issue.

If you have activated the function of bios password then you definitely another issue to resolve.

You can try to clear CMOS and passwordto put the settings back to normal.  See the image to the location of these jumpers below.

Tags: HP Desktops

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