Update:It wasn't the Trojan. The laptop's power supply/distribution system was frying components, including my hard drive. The shop was able to recover most of my stuff (Huzzah!) but I've been having to get it all transferred over to the new laptop, and considering how convoluted newer program licensing works, moving programs has been a PITA.
No matter now. I have the core programs I need installed and can slowly migrate datafrom the old hard drive (what is there anyway), reinstall most other programs, and migrate from backup DVD/CDs as I go. The Dell XPS 15 served faithfully for about 5 years, which is probably 80-100 years in Human terms the way I used it.