No, not a Plasma CNC. But I once worked in a shop with a Chassis dyno, and the laptop would have a kniption fit at random, where the dyno soiftware would freeze and have to be killed with the task manager and restarted (maybe once every 3-5 dyno pulls) with anything much over 900 HP at the wheels - SSD fixed it. Just for kicks, I took the ferrite choke off of the USB cable going to the control box that ran the eddy current brake, and it still didn’t have a problem (the ferrite choke was supposed to fix that problem). My laptop in my shop would get a BSOD if it was accessing the hard drive when I started an arc with my big plasma torch, within about 30 feet (not CNC, and I mean BIG - it has a lift hook, not a handle, and 5" casters), and an SSD fixed that (to be clear - this would happen with nothing plugged into the laptop, not even the charger). I once worked in a shop with a medium-ish CNC mill (10 HP 3ph spindle), and any time there was even a brownout, the back-EMF on the lines (from the spindle) would go through the cat5 cable, and any software that was accessing the hard drive at the time would freeze up, and have to be killed from the task manager and restarted, and an SSD fixed it (a ferrite choke helped, took a bigger brownout to freeze the cad software). That computer wasn’t affected directly by the brownouts - I could sit there and keep drawing for more than 15 minutes during a complete blackout, due to a massive UPS (with brownout protection), that was intended for small servers. But no, no CNC plasma machines - the one I just ordered will be my first one. I’ve been the accidental IT guy at most places I’ve ever worked since computers became common in shops, as well as the equipment repair guy, and in most cases, the only CNC programmer, but I’ve never even been close enough to touch a CNC plasma machine (watched a Lincoln 5x10 from 15 feet away for about 10 minutes, at a shop belonging to a vendor for one of my previous jobs). I just thought it was worth asking, since I’ve seen other EMF related problems with similar symptoms, or caused by plasma arc-start, that I was able to completely solve with an SSD. However, since it happens with an SSD, but not every arc-start, I think it has to be the status of the data interface over the USB cable, between the laptop and the CNC controller, and the freeze is probably caused by the USB controller on one end or the other of that connection. Since it’s not everyone having the problem, I’m going to bet that if we looked at logs of who is and isn’t having the problem, with laptop serial numbers in the data set, we could narrow down which USB controller chipsets have this problem, and which ones don’t, so that one could look at the list and pick a laptop with a less sensitive USB controller. I have a vested interest in this issue, as I haven’t bought a dedicated laptop for my crossfire yet, and as soon as I saw this topic, and read the posts, it occurred to me that it was likely the specific equipment in the laptop that makes the difference between who has the problem and who doesn’t.