Not sure ow you arrived at that...I might have missed something...
but I thought the last difficulty was that she was not seeing a BIOS screen...which to me would indicate, one of a)keyboard problem b)monitor problem C) motherboard problem
All the drive activity of the trojan loader and removal efforts probably ended its miserable life, but it was showing signs of trouble for a long time. Bootups took longer and longer, etc., and files corrupted, but scandisk never found anything wrong when it did run.
People who write trojan loaders, etc do NOT want the machine disabled. They NEED a running machine to sell for their botnets. A broken machine is of no value to them...So I do not regard it as an atack per se.
Anyway, recovering the data from a badly infected drive may not be the best answer anyway. It's like digging up the corpse of a plague victim.