Clean install w10 from w8

Caledon Ken said:

Thanks for the make model. So this is a Lenovo and when you say bought online, with DOS, I assume you mean you bought a pre-owned laptop. I guess the original owner deleted the recovery partition, correct?

I realize this may already be in thread but.....

Where did you get your copy of Windows 10? You said you are using Disc. Using the Windows Media Creation tool to create a bootable USB copy of 10 might ensure you that you have correct software formatted correctly on a USB key.

Something to consider after trying NavyLCDR's and other members guidance.

Thanks Ken, NavyLCDR and everyone for all the help. unfortunately nothing seems to work as I tried all the methods..

What I did to fix this is I physically removed the HDD copied everything in another pc, and then cleaned disk through CMD

followed this link

Convert GPT drive into MBR using Command Prompt (cmd).


installed W10 (worked fine) and thats it!!

and Ken it was a brand new laptop i purchased w/o OS and then installed W8 separately, as this model comes with DOS only.

cereberus said:

So you have now down a legacy bios install. All your problems stemmed from the bios setting saying you had set legacy bios support. Had you changed that setting to uefi, it would have installed as uefi.

Lenovo's are slightly unusual. On most pcs, if boot setting is set to legacy bios, pc will only boot from a legacy bios install, and similarly, if set to UEFI, it will only boot from a UEFI install. Lenovo's can boot from either irrespective of the boot setting.

So you can have the bios setting set to legacy bios, but it will boot from a uefi drive. However if you try an install, it will only install according to the setting and drive needs to be in correct format.

You could now convert the drive to gpt using the mbr to gpt tutorial, and it will boot ok.

I dont know what exactly was the problem but i wasnt able to see UEFI option in boot menu, tried all possible ways from bios and boot. but nothing worked, so cleaned everything and changed to MBR, then put everything back to HDD. long process but that was the only solution I could think of.