Hello @Cem Engin
As it seems you have already tried all 3 bootrec commands from the Startup Repair option, right?
bootrec /FixMbr
bootrec /FixBoot
bootrec /RebuildBcd
Other than that I can recommend to access the BIOS, unselect the UEFI Boot option and leave just legacy. This should.
Hope this helps in your query.
Best regards,