Karma is a bitch. So... I'm a developer and I sometimes make fun of people for being stupid and installing crap that infects their Windows machines (and I've never had a virus or malware before on PC,) so you'd think I'd know better, but I let my guard down a bit and installed an out-of-Google-Store app on my Nvidia Shield, and now it opens a Google Play store app link for an Anti-virus app every 30 minutes or so. (Ironic, isn't it?) The offending app has been deleted, but of course it does not remove the 30-minute-apart interruptions. And who knows what other business the ware is working in the background? (BitCoin Mining? DDoS attacks?)

Is there any kind of task killer app someone might recommend that I could use to view running processes? Or maybe some sort of method to view startup processes and disable them? The safest bet would probably be to do a System Reset, but there's one complication with that...

I boot off an external 4TB drive, and that drive contains my 1TB Plex media. I did this because some apps are not written to utilize external storage. On top of this, my computer does not recognize the Shield's file system on the drive, so I can't (easily) hook the drive straight to my computer to backup files. This means I have to move files over my network to back them up, run the system reset, and then move them back, which takes days. Does anyone know a way I can reset my Shield without loosing my media library?

Thanks in advance.