Remove the hard drive from the laptop and connect it to another computer as a slave drive(internal) or as an USB drive(external). Do a full scan on the infected drive. Be sure “autorun” is not enable on the good computer and so is the Windows Recovery. You may need administrator privilege to access the drive if it’s in NTFS format.
Once the drive is disinfected and clear from bugs, reconnect it back to the laptop. You probably have to do a manual cleanup of the Windows registry to get rid of all references to the bug.