Steps for removal#

1. open powershell with administrator privilege.

2. run takeown /f PATH_TO_CYGWIN /r /d y, for me, PATH_TO_CYGWIN = C:\ENVs\MinGW64.

3. run icacls PATH_TO_CYGWIN /t /grant everyone:F

4. run del PATH_TO_CYGWIN.

5. check if the files are deleted and delete the residual files.