If you've encountered a problem with a Windows upgrade, you know how maddeningly unhelpful Windows error messages can be. These are my favorite troubleshooting tricks.
On Windows 10, you can use the DISM command tool to repair the local image, which you can use with the System File Checker ...
Microsoft really doesn't want customers to upgrade older PCs, but there are workarounds for many models. Here's everything you need to know.