Hello mermaidhaylee...
I'm sorry you're having this issue with your dv4! Don't worry, this is not a virus - the system is working as designed and is trying to fix itself. Just plug it in to your AC power adapter.
What has happened is that when you powered up the machine, the BIOS checked it's own health and determined that it had somehow become corrupted. In cases where this is recoverable, the system then tries to restore a "good" BIOS from the hard drive (the "HP BIOS Update") screen. the catch is that we won't let a BIOS update occur unless 1) the battery level is at a minimum of 50% capacity, 2) the system's power adapter is connected and plugged into a good AC power source, or 2) both.
Assuming that your AC adapter and/or battery is functioning, once you plug it in you should see the system proceed part the "BIOS Update" screen to a Recovery screen similar to the attached example. Upon completion of the recovery, you'll see the system reboot and display a screen saying that a BIOS recovery has been completed.
I hope this helps. Good luck!
DISCLAIMER: I am an HP employee, but I am not a spokesperson for HP.
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