start "" explorer.exe "C:\Folder1"
start "" explorer.exe "C:\Folder2"
start "" explorer.exe "C:\Folder3"
If you want the Explorer windows to show up with the tree structure in the left pane,
start "" explorer.exe /e,"C:\Folder1"
start "" explorer.exe /e,"C:\Folder2"
start "" explorer.exe /e,"C:\Folder3"
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