If the BIOS update (a doubtful advice, by the way) succeeded, you can go back to factory conditions yourself if you have the restore disks that came with the laptop or that you made (or now make) yourself. Just use those to go back to factory conditions. No need to have HP do that.

But first copy everything you don't want to lose to an external hard disk. And from there to another PC or laptop, just in case that external disk decides to break down before you copied that data back. Those things do really happen.

I assume you already did a scan for viruses with a CD-based antivirus tool (there are others than Norton, and most are free) and for other malware with MBAM and that those didn't find and remove anything. If not, post back for more detailed instructions.

Kees