Difficulty in Accessing BIOS/UEFI Settings on Windows PC

You are trying the common startup keys, but the firmware screen flashes or stays blank before you can make the required change. On Windows 11, avoid the timing problem by entering UEFI through Windows. Save your work, open Settings > System > Recovery, and choose Restart now beside Advanced startup. In Windows Recovery Environment, select Troubleshoot > Advanced options > UEFI Firmware Settings > Restart. Have the BitLocker recovery key available before changing firmware settings, and record existing values so they can be restored. If UEFI Firmware Settings is missing, the device may use legacy BIOS or expose firmware access differently; use the PC manufacturer’s instructions for the exact model rather than trying random keys. If the manufacturer’s method also produces a blank screen, disconnect docks and external displays, retry using the built-in display, then contact the manufacturer because Windows cannot repair or configure an inaccessible firmware interface.