Perry Whittle (5/29/2015)
open explorer and find the data folder then right click and select properties. On the security tab you'll see details of permissions applied
for the master.mdf permissions are as follows
everyone- full control
system-full control
service administrator-full control
SQLServerMSSQLUser$SQL$MSSQLSERVER- Full Control
Administrators[servername\Administrators]-Full Control
Same Permissions are applied to the mastlog.ldf