Setting Permissions Setting permission on the Files / Folders using cacls Cacls FolderName Path / Filename with path /e /t /g :C Other Options CACLS filename [/T] [/E] [/C] [/G user:perm] [/R user [...]] [/P user:perm [...]] [/D user [...]] filename Displays ACLs. /T Changes ACLs of specified files in the current directory and all subdirectories. /E Edit ACL instead of replacing it. /C Continue on access denied errors. /G user:perm Grant specified user access rights. Perm can be: R Read W Write C Change (write) F Full control /R user Revoke specified user's access rights (only valid with /E). /P user:perm Replace specified user's access rights. Perm can be: N None R Read W Write C Change (write) F Full control /D user Deny specified user access. Wildcards can be used to specify more that one file in a command. You can specify more than one user in a command. Abbreviations: CI - Container Inherit. The ACE will be inherited by directories. OI - Object Inherit. The ACE will be inherited by files. IO - Inherit Only. The ACE does not apply to the current file/directory. Setting Permissions on Registry using Subinacl.exe Download here Subinacl.exe /subkeyreg "HKEY_CLASSES_ROOT\Key name" /grant=Users=F the registry key should be in the format HKEY_CLASSES_ROOT not HKCR, HKEY_LOCAL_MACHINE not HKLM