I know only of two KiCad 5.1.5 stable Windows versions (32 and 64 bit) so as I have written that Windows and 64bit I supposed it is enough information here (not in bug reporting system).
Specially that I do not see that problem with configuration so more interested would be not the full information of my 5.1.5 but the information of the version of KiCads having problems. We don’t know even a number.
My help-about is:
Version: (5.1.5)-2, release build
libcurl/7.66.0 OpenSSL/1.1.1d (Schannel) zlib/1.2.11 brotli/1.0.7 libidn2/2.2.0 libpsl/0.21.0 (+libidn2/2.1.1) nghttp2/1.39.2
Platform: Windows 7 (build 7601, Service Pack 1), 64-bit edition, 64 bit, Little endian, wxMSW
wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8)
OpenCASCADE Community Edition: 6.9.1
Compiler: GCC 9.2.0 with C++ ABI 1013