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mklink
mklink is good for making directory/file symbolic (or hard) links.
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Link to a shadow copy
If you've made a shadow copy because you're sneaky and want to extract hives from it, one strategy that might work is to create a link to the shadow copy backup, and then copy the hives from there:
mklink /d C:\tempbackup \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy123\