So I was working on some code, and bam, power outage.
Whatever, I save often, so it’s no big deal.
Unfortunately, Unity will no longer open, and instead gives me the following error:
Can’t open the project at all, it just gives me this.
Fixed it. Unity was closed without it being able to delete the temp folder. That folder was dirty, so I couldn’t manually delete it without running a chkdsk. Checked, deleted, reopened, having to reimport assets, but whatever.