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- HP Community
- Desktops
- Desktop Boot and Lockup
- Slow BIOS start after BIOS update

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10-09-2018 06:49 AM
Hello everyone.
I have recently updated BIOS for EliteDesk 800 G2 TWR from version 2.05 to 2.36.
After this update a new bug/annoyance was introduced.
BIOS loading times are monstrous.
After turning the PC off, it takes about 80 seconds to show a prompt on screen ( a little blinking dash ).
After next 35 seconds there is a BIOS screen with motherboard manufacturer and info so I can enter boot device or BIOS setup.
After next 80 there is Windows screen that the system is loading and from that screen it takes another 5 seconds before the Windows login screen is available.
In total it takes 3 minutes and 20 seconds on a fairly decent machine from pressing power button to user login form.
I tried restoring the old BIOS but it tells me that there are restrictions for that whereas there are none.
I tried restoring factory defaults in BIOS but to no avail.
I have even tried removing motherboard battery but it failed again.
Those boot times are weird and were only introduced after the BIOS update.
Do you have some tips for me?
10-09-2018 06:54 PM
> I tried restoring the old BIOS but it tells me that there are restrictions for that whereas there are none.
Some of HP's BIOS-updates add code to restrict the loading of any older version of the BIOS.
Turn the computer off.
Disconnect the power-cord.
Remove the side panel, to expose the disk-drive.
Disconnect the "data" and "power" cables.
Replace the side panel.
Remove all USB devices other than the keyboard & mouse, e.g., memory-stick, scanner, printer, webcam.
Reconnect the AC power.
Reboot, and measure the same timing-points that you have documented.
Obviously, the computer cannot boot from the disk-drive.
Tell us the results.