![]() I'll post how I did it, I need to recap the right things I did because I've done a lot and the next problem I'm facing it's so difficult that it's almost impossible, and I'm messing around with many things. And it's an easy and instant command (if you have all green lights when using the /validate option).ģ) Not necessary anymore, I solved it. Even Windows has the mbr2gpt command to mantain all data and third party partition softwares have it. I imagined going to a repair shop or a mechanic asking for help, and dude asks why I need help. To be more specific (and to avoid the "why you need to boot into UEFI mode), I'll say that legacy/bios boot is old as heck, and modern systems don't even have legacy boot, and I want to clone my old system to a new one, that doesn't support legacy/bios boot. And this is a fact, you can't have MBR disk to boot into UEFI. I need to convert my disk to GPT to boot into UEFI mode. Other than the fact that I already said that at the end of the post, I'll answer. Obviously without losing data, I wouldn't be here otherwise.ġ) I think this is the hilarious question to ask in a forum/site on a technical help request. For example, you might want to do this if you use a flash drive to store data files you need to use on your Mac at home and when using a Windows-based computer. In the list of drives and partitions, confirm that the system and utility partitions are present and are not assigned a drive letter. The list of available drives and partitions appears. There is any way to fix this problem? I need to convert this disk to GPT so I can boot in UEFI mode, I just need that. Click Start, right-click This PC, and then click Manage. ![]() I also tried to use bootrec commands but with no success (even with creating a FAT32 500MB partition, the bootrec /fixboot command return the Access Denied error and I can't recover from it with bcd command). I'm almost 100% sure that the problem is that I have no boot nor recovery partition because when I installed Windows 7 i created only one partition and the boot information are on the first partition (I have boot and recovery folder under C:\ with all the needed files). Funny, because I can boot the PC and I'm writing this post on this PC right now. With the mbr2gpt command I have a "Disk layout validation failed" error and with AOMEI if I convert to GPT it causes an error and it convert the disk to GPT deleting all partitions (thank god I can go back re-converting to MBR and restoring partition).ĭoing the shrink volume trick with 200MB and 2GB on both partition, the mbr2gpt returns "Cannot find OS partition(s) for disk 0". I can't convert to GPT disk, nor with mbr2gpt command (in Windows or using a bootable usb), nor with tools like AOMEI Partition Assistant. I have a single system partition and another one with data. Hi all, I have a particular problem.My PC was a single partition Windows 7 upgraded to Windows 10.
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