Windows 10: Changing Boot Mode

Hi,I've have HP Elitebook 840 G2 running on windows 10 pro, The boot mode is UEFI Hybrid With CSM. I want to change this to UEFI Native Without CSM so that I can enable Secure Boot Option.So my question is If I change the boot mode from UEFI Hybrid With CSM to UEFI Native Without CSM in BIOS does I have to reinstall windows 10? Please Help meThanks In Advance

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laptop doesnt boot automatically

This is what happened.

1. Did a repair install and later disabled hibertnate in CMD.
2. Enabled legacy option ROM in BIOS.
3. After a few times startup ( i used the system in such mode for 5 days), changed boot option back to default.
4. Vola!! It boots automatically to win10 without any keypress. Tested it with many starts to confirm the same.
5. Re-enabled hibernate option using CMD and later selected Fast Startup.
6. System booted normally, without the need for any keypress.

I do not know exactly whether such steps resolved the problem or what else happened, hence cannot suggest above steps.

Many thanks to all members who helped to troubleshoot problems.

 

Changing boot hdd

I downloaded PartitionMagic8.0, but the partition i want to make is not bootable.
So the system boots from the old, loud hdd, and when i unplug the old, it doesnt boot.
Any advice or suggestions how to change boot hdd without reinstalling Winxp?

 

Cannot Enter Safe Mode / Computer boots normally

I'm running Win 10 Pro 1903.

Here are the steps I have taken to get into safe mode: Start button, settings, update and security, recovery, advanced startup, troubleshoot, advanced options, startup settings, restart. The computer boots normally, not in safe mode. Any suggestions would be most helpful. Thanks in advance for your help and interest. .