I've read multiple posts regarding this problem with suggestions ranging from everything starting with decreasing your RAM, increasing your RAM, testing the RAM for errors, blah, blah, blah.
I don't have a solution, simply a suggestion....
Check with the PC Manufacturer or the Motherboard Manufacturer and see if there is a BIOS update available. My thinking is that the information is not being handed off properly or the Windows 10 installer is unable to interpret it correctly.