Poor performance after performing refresh

I've been using Windows 10 for a few months now without any problems. A couple of days ago, my computer stopped booting, up, instead getting stuck in a loop between failed startup repair attempts and resetting. After finding no way to resolve the issue, I performed a refresh of Windows 10. Now my computer boots up again, but the performance is much worse than before. Just starting up the computer takes a couple of minutes when before it only took a few seconds. Every application is incredibly slow. My internet connection is also much slower than before. I reinstalled all my drivers after the refresh, but that hasn't helped much. I've also tried running startup repair, but all I get is an error message telling me my version of Windows isn't compatible with it. Does anyone have any idea what might be the problem?