How can I use the Windows Recovery Environment (WinRE) to fix my Dell laptop stuck on the error recovery screen?

If you can access WinRE (usually by interrupting the startup process multiple times), navigate to 'Troubleshoot' > 'Advanced options'. From there, you can try Startup Repair, System Restore (if you have a restore point), Command Prompt (to run system file checker - sfc /scannow), or Reset this PC (which reinstalls Windows).