The overnight update to our laptop took about 10 minutes to boot and login. Then spent many minutes updating security settings. Now after about 10 more minutes, it seems to be up but is useless due to, I think, 100% disk usage, although I can't see anything using much, and no apps running.

Not sure how to get it healthy, as any response to a request takes about 5 minutes.

Pretty much useless; anyone else have this problem?