It follows junctions instead of deleting them. Because of it I lost my C:\ProgramData :(

[BlackRule]

I fast-deleted G:\ProgramFiles of old windows. Then when most things stopped working after reboot I did

C:\Users\userOnWorkingWindows>dir /A:L /S "C:\"
....
 Directory of C:\ProgramData

    <JUNCTION>     Application Data [C:\ProgramData]
....

And found out that C:\ProgramData\Application Data is JUNCTION to C:\ProgramData And by deleting G:\ProgramData I deleted G:\ProgramData\Application Data and therefore deleted C:\ProgramData so deleted the ProgramData of current windows
That's my theory The fact is I fast deleted G:\ProgramData and most of my C:\ProgramData is lost now