You can use NIUBI Partition Editor Free Edition to convert Dynamic Disk to Basic without losing data on Windows 11/10. All features discussed.

I have modified MBR from 0x42 to 0x07 in windows 7 to convert dynamic to Basic disk i.e. 0000001C0 01 00 42 to 0000001C0 01 00 07 and now my system is not booting up it is just showing only c ...

And I forgot to mention, that this is the method to recover data if you have a dynamic disk that gets a corrupted partition database and becomes unusable.

Basic Disk vs Dynamic Disk. Post shows how to convert basic disk to dynamic disk OR dynamic disk to basic disk using UI, Diskpart, CMD without losing data.