I Need Help with installing

I have one hard drive which is already formatted as MBR with windows installed. I can not format the whole drive because I need windows, but I can create an additional partition. The installer USB can not install to the new partition I made because it is not APFS formatted. I can not format as APFS because it needs a GUID disk. Can anyone help me out?

submitted by /u/Naughty_Goat
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