starting mypc requires me to press F1 or F2 issue

The F1/F2 prompt appears before Windows starts, so enter Setup with F2 and inspect the reported firmware or hardware problem before changing or resetting anything.

Check the firmware information

1. Start the PC and press F2 when prompted.
2. In the BIOS/UEFI setup, inspect these items without changing them:
   • Date and time
   • Information/Main: confirm the internal HDD or SSD is listed
   • Boot: confirm Windows Boot Manager or the internal Windows drive appears
   • Hardware Monitor/Diagnostics: look for fan, temperature, memory, battery, or drive warnings
   • Any displayed error or diagnostic code

UEFI/BIOS controls startup before handing control to Windows, so Windows repair, Safe Mode, or reinstalling Windows is not the appropriate first step for this prompt.^1^

Only inspect the settings initially. Changing unrelated firmware options can prevent Windows from starting.^2^

Apply the matching action

• Incorrect date/time or settings that reset after power is disconnected:
  This indicates that the motherboard’s CMOS battery may be weak. On many desktop PCs it is a replaceable CR2032 battery. Turn the PC off and unplug it before replacement; for a laptop or sealed PC, have the manufacturer or a repair technician replace it. Forgotten firmware settings and reset time are strong indicators of a weak CMOS battery.^3^
• Internal drive or Windows Boot Manager is missing:
  Do not reinstall Windows yet. Turn off the PC and have the SSD/HDD and its connection checked. If the drive is present but not first in the boot list, place Windows Boot Manager first, then choose Save and Exit. A similar startup case was resolved by restoring the internal drive or Windows Boot Manager as the primary boot device.^4^
• Fan or temperature warning:
  Shut the PC down rather than repeatedly pressing F1. Check that the fans turn and that vents are not blocked; obtain hardware service if the warning remains.
• Memory, keyboard, battery, or another diagnostic error:
  Run the built-in diagnostics if the firmware offers a Diagnostics menu. Otherwise, the complete error must be inspected by a repair technician; “Press F1 to continue” alone does not identify the failed component.

Reset firmware defaults only conditionally

Use Load Setup Defaults, Restore Defaults, or a similarly named option only if the firmware reports lost/invalid configuration or the problem began after firmware settings were changed.

Before resetting, write down or photograph:

• UEFI/Legacy boot mode
• Boot order
• Storage-controller mode
• Secure Boot state

Then load defaults, save, and restart. Resetting firmware defaults has resolved invalid-configuration startup warnings, but it is not a universal fix for an unidentified POST warning.^5^

“Windows 10 Pro” identifies the operating system edition, not the computer manufacturer or model. Because the omitted lines above the F1/F2 prompt normally identify the fault, seek the PC manufacturer’s hardware support or a local technician if Setup does not reveal a clear warning.

References

1. United Extensible Firmware Interface (UEFI) firmware requirements
2. Enable Virtualization on Windows | Microsoft Support
3. My pc boots into BIOS the first time I turn it on every day - Microsoft Q&A
4. Re boot and select proper boot device or insert boot media - Microsoft Q&A
5. Question About Boot-Up Warning Bypassed - Microsoft Q&A