In addition to being an atmospheric scientist, I'm also a software developer. I've been repairing computers (SW and HW) since I was a teen.
When I faced a computer, whether my own or someone else's, with a software problem, I would look through the logs, identify the problem, and fix THAT PROBLEM.
When I faced a computer, whether my own or someone else's, with a software problem, I would look through the logs, identify the problem, and fix THAT PROBLEM.
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I did not delete entire folders without knowing what they contained.
I did not reformat the hard drive unless I had absolutely no choice.
And if I did reformat, I backed up everything first.
I had another machine that could run what I needed it to run until my regular one was good to go.
I knew that I would need to keep "operations" going, so I prepared. I did not blithely wipe out one without having another going.
Find another shop.
The United States Government is that computer, except millions of lives and livelihoods are at stake.
Something to consider.