directory
Problem a.
Ii. U disk installation system steps
3. Solve
4. Reference

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Problem a.
 
Recently in the antique level computer reinstall the system, considering the introduction of domestic memory, good cheap oh, old computer thrown away, unfortunately, do not throw away the place, fortunately, upgraded once;
 
Since the old computer is the BIOS MBR boot partition, the default installation of Windows 10 is UEFI, so when I use the USB drive to install, I will go to where do you want to install Windows?This step, format the C disk partition, pop-up can not format, [error: 0x8004242D];
 
Ii. U disk installation system steps
 
Briefly record the process:
1. Download address: https://www.microsoft.com/zh-cn/software-download/windows10;
2. Download MediaCreationToolXXX. Exe.
3. Use mediacreationToolxxX. exe to install on usb storage;
4. Modify the BIOS boot item to boot on the U disk;
5. Change the Boot Mode, modify the SATA Mode (old computers, AHCI), explain and illustrate the reference address: https://www.zhihu.com/question/26048255;
6. Save THE BIOS Settings, then plug in the U disk, restart the computer, and follow the steps to install;
 
Normally according to the above operation steps, high probability is no problem; But still can’t for some machines for problems, such as I have met with the latest version of the Win 10 ISO is the default mode of EFI boot (but most old computer’s hard drive seems to be in the form of MBR boot partition, otherwise don’t call the old computers), go to format the partition that step, the next step walk not bottom go to, format the hard disk, is not willing to give up, instead of MBR and GPT will lose data, throw a partition also calculate, the key is to format the hard disk data;
 
I don’t want to format the entire hard disk or lose data, but I still want to boot the partition hard disk in MBR format and then install the Win 10 system. What should I do?
 
3. Solve
 
Delete the EFI directory and xxx. EFI file in the usb boot, restart the computer, and then switch to MBR to install and boot.
 
4. Reference

http://rufus.ie/; https://baike.baidu.com/item/EFI/2025809?fr=aladdin;

 
 
(after)