Crashes during footage scrubbing, opening export panel & opening other apps

I am trying to figure out the cause of the instability of Premiere Pro on my machine. These crashes will happen every 20-30 minutes. Even sometimes crashing to the point where premiere wont be able to load the project and crash immediately upon opening. 

I am unsure if it is a fault in my computer, or simply a bug in settings. As far as I can find, all drivers are up to date, (graphics card using Nvidia Creative ready drivers), and windows is up to the most recent version (forced to by windows itself). Tech Specs are below.

2018 Razer Blade 15 

i7-8750H CPU @ 2.20GHz

Ram: 16.0 GB

512 GB SSD

Nvidia 1060 max q

I do edit on external hard drives. Some 5400rpm and some 7200rpm, and the problem persists on both.

I have uninstalled and reinstalled Premiere, as well as completely reset my laptop to factory specs. Neither has helped, and will still have crashes from the get go.

Like in the title, the project will crash when scrubbing footage ( H.264, 1080, 200mbs, all-intra), or simply moving the play head to a separate clip on the time line. As well as opening the export menu, and opening apps like google chrome. Sometimes it will just freeze, becoming non-responsive, crashing my computer. If it doesn't crash and I am able to close the program, I am then unable to open the start menu, and forced to hard reset the laptop. This will happen regularly during an edit period.

A few times, I am unable to open the project, because Premiere pro will just crash before even opening the project. This is something that I found the project can be salvaged by opening the project on a completely different computer.

When having the Task manager open, I can see that the processor, graphics card, and memory are not being fully utilized. The slower drives do get fully utilized, however the problems still happen even when editing on the ssd and the faster hard drives.

Thank you,