If you're used to using the "Run" box to open apps, you can use that to launch Command Prompt with admin privileges. Press ...

If you need to troubleshoot Windows 10, improve system performance, or just want to clear up some disk space, clear your cache.

If a Windows upgrade has ever gone sideways on you, you know how vague and unhelpful the error messages can be. Here are my go-to troubleshooting tricks when that happens.