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I have to do that a lot more now than I used to. My group has been down-sized from 17 to 5 people over the last 5 years, and so I get to maintain a fair amount of other folks' code. Sometimes it takes a shot of whiskey with a Zofran[^] chaser to stay consistent with how they did things, but as long as it pays the bills...
Take a new image backup onto a new, clean media - do not plug your existing backups in until you have either confirmed the lappy is clear or wiped all the HDD's and then clean install / restored.
But ... Phobos isn't new - it's about a year old, IIRC, so I'd be surprised if any up-to-date detector missed it and that includes Defender.
Does Defender automatically scan all files on USB media? Or does it wait until you try to use it? (I'm not suggesting you try an experiment to find out, unless you do it in a VM / Sandbox for all the obvious reasons.)
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
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