I messed up big time... I wanted to dual boot Ubuntu and Windows 10. First, I didn't know that my computer is on EFI so I followed a tutorial that couldn't work because of the EasyBCD problem. Then I wanted to follow the right one for EFI. And what happened is that I found the unallocated disk space where I installed Ubuntu previously and used EXTEND to add it to C disk but I forgot to delete the unallocated space. Ubuntu stayed installed without an option to boot but I now don't have a partition to delete so I can start freshly. Is there any way to save this now or do I need now to format even disk C? With the pen drive, I am still in Ubuntu. Maybe I can delete everything from here? I really don't know what to do here.
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