After a Windows Update, the laptop bootloops at bootup

@jayeff Sure, will try later.

@meev

If it doesn't work restore the BIOS settings that you changed to what they were before, get into BIOS again and change the boot order priority to USB first boot option and then reconnect the HDD and reassemble the laptop. etc.

Next, create a Win 10 USB recovery drive (example only) and then insert it into the laptop's USB port.

Start the laptop and it should boot into the recovery menus.

You can then either try:

Troubleshooting → Advanced → Startup repair and see if that works.

If not go to Troubleshooting → Advanced → Startup → Restart. After it restarts select Safe Mode with Networking.

If you can get into safe mode uninstall the update and then check when booting from the HDD i.e. remove USB

@jayeff The problem is that I could not get past POST. This means that I cannot get into BIOS even if i tried to.

@jayeff Loading one of the two hard drives in will result in a 5 - 15 second hang until it loops again. I would guess that an internal component had failed/died and the system cannot operate further.

@meev

Looking at an image of the motherboard for the model, (hopefully yours is the same) there is a cmos battery plugged into the board - see lower right side of board.

Try a power refresh just to eliminate a corrupted BIOS as the problem.

Disconnect the charger (if connected) disconnect the main battery from the motherboard disconnect the cmos battery from the motherboard then press and hold the laptop's Power button for a full 30 seconds and then release it.

Reconnect the cmos battery, reconnect the main battery, connect the charger and check what happens.

if still no good then it's a motherboard problem.

Very coincidental that it happened at the same time as an update though.