Windows-CI

Small bug fixes in `LDMatrix` and `system_utils` #25

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Run time

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Job	Run time
build (3.8)	3m 21s
build (3.9)	4m 8s
build (3.10)	3m 32s
build (3.11)	5m 10s
build (3.12)	4m 28s
	20m 39s