You’d mash during boot, see the Advanced Boot Options menu, and select "Last Known Good Configuration" to roll back your registry and driver settings to the last time the PC actually started successfully. It saved many a system from a bad driver or a misconfigured registry tweak.
If you really miss the F8 menu, you can re-enable it via bcdedit /set {default} bootmenupolicy legacy in an admin command prompt. However, on NVMe SSDs and UEFI systems, you’ll still blink and miss the window. windows 11 last known good configuration
Have you successfully re-enabled the legacy boot menu? Let me know in the comments—just be warned, it’s slow! You’d mash during boot, see the Advanced Boot
The short answer: Microsoft removed the legacy F8 menu and the classic LKGC feature years ago. You’d mash during boot