Hi anak I tried that but the next button is greyed as you can see in the pic.
I think its because its a dynamic drive and has other active volumes in it?
Actually I wanted to convert to basic so that I could try out ubuntu using wubi. I wont run on dynamic discs
So I tried the option 4 in this guide Convert a Dynamic Disk to a Basic Disk
In that I clicked delete volume D in disc0 and then I noticed that I could not delete the whole disc because the volume C contains windows.
Now I need to get back volume D