Windows 10: Windows is not booting after active partition is changed.

I tried changing the active partition via cmd. And I have set "C:" as active. After that I restarted my laptop with windows OS. Then this was problem found, "Operating System not found" in black screen. I can't able to login and don't know what to do? Help me to resolve this.

:)

 

Changing active partition

I'm installing a new hard drive (just hard drives, no SSD or anything here), to use as the main Windows partition. When that's done, I want to set it as the active partition, then start moving files from the old partition. But I've never done this before. Is it really as easy as right-clicking the drive in the storage manager, setting as "active partition," and resetting? There are tutorials floating around, but seeing as I'm messing around with hard drives, I'd rather have someone's input.

 

unmark a partition as "active"

After changing to active partition my computer doesn't boot so what can I do now?

 

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]