Stuck in UEFI after reset to default.

kmint said:

Thanks a lot @Arc.

But the question is that I can't do that, I have no choice.

I burn the W10 iso to the pendrive with the Micrisoft tool (W7 USB DVD Download Tool is called) and I can't install it when it is GPT partition system or when CSM is enabled (doesn't even read the pendrive)...

This is a nightmare.

Try Rufus. It works great. UEFI Bootable USB Flash Drive - Create in Windows

You dont need to wipe up the HDD. Follow the Partition Wizard technique to convert it to GPT.

kmint said:

And which option should I choose in Rufus?

Thank you very much.

This should be OK.

kmint said:

Hi, when I try to convert the disk to GPT I get this warning. What should I do? Thanks

You have to do it using PW boot CD as stated in post #14 earlier.

Arc said:

Now, if you want to keep the D drive intact, get the PW Boot CD (as the C drive is there in the same HDD, the installed version of PW will not do the operation). Follow it: How to Convert MBR Disk to GPT Disk | MiniTool Partition Wizard Tutorial
.