Windows 10: Accidentally deleted windows 10 from NTFS partition and moved to UEFI from Legacy support

Hello. My brother "learnt" how to use cmd and he deleted my windows and format my local disk from diskpart command and he put my bios to UEFI from Legacy. Now i don t have windows on my laptop and BIOS don t work without any OS installed. What should I do?

:)

 

Accidental deletion of UEFI partition

Neither of the two links you supplied were able to recover the missing partition, so I'm thinking that there is something seriously wrong with the drive.

Someone else suggested that I try to obtain from Gateway an official, full-factory restore disc (not a Windows recovery disc, but one for the full, original OEM factory setup). This would presumably contain an image of the entire hard drive, including the
UEFI partition. Any thoughts?

Would it be wise to reformat my drive (NTFS), thereby deleting everything, and to start again with my OEM Windows 7 disc?

 

Move Win7 64 image from a partition NTFS to a new drive

EDIT: After reading your first post again, is there any reason that you would now need GPT? Are you just trying to move the windows install to a new disk or is there a new motherboard involved?

If you are already booting to an NTFS partition, then it makes me wonder if after copying to the new drive, the partition isn't getting marked as Active.

Following the same steps I posted above for startup repair, you can get to a command prompt and use diskpart to see if this is the case.

Code: In the command prompt: diskpart list disk select disk 0 (disk number may be different if you have other disks connected.) list partition select partition 0 (partition number number may vary, but you want to see the boot partition which is the same as your windows partition according to the screenshot on the OP) detail partition (This should have Active: Yes or No. If it says no, since we have the partition selected, you can just use the following command in diskpart) active[/quote]

 

Accidental deletion of UEFI partition

On my uefi bios there is an option to set it to load the bios configuration in legacy or uefi.

This also lets me choose how hardware is loaded and if both uefi, legacy or both load and the order.

What your issue here could be that the win7 disk is loading in the format that looks for the uefi partition on the hard drive because it was a uefi bios on win7.

Now this may not be true because win8 was the first native os that supported uefi bios, even though win7 could be installed on uefi bios under 2tb hard drives the drive format had to be mbr.

Another thing to look into is if your bios has a boot save order option that it is reverting back to even though you set the devices in a different order.

There is a program called disk part, it is a small iso base on linux that can check drive partition and status.,it can be run from the cd with no installation needed.

Being that the hard drive partition was deleted but attempted to be fixed could have caused more

effects because now the underlying data may have been recovered with 3rd party tools.

What is the size of the hard drive ?

Not being able to load the win7 disk or win10 disk sounds more like a corrupted bios or bios configuration.

Win10 has a habit of reporting incorrect information to the bios.

Pull the win10 backup hard drive and try to boot the pc with win7 or win10 disk.

What this would confirm is if it is something besides the win10 installton.

Being that there is an image of win10 and the other steps do not work; connect the drive with the backup on it, try to boot from the win7 or 10 dvd disk and run the restore from there.

Would be a good option to copy that backup first to another drive before hand.

The only other option is to delete all partitions on the win10 drive using another pc or gparted and start fresh.

On the drive connecting and disappearing, that could be a power management setting that the pc time out is set too low.