new account inheriting permissions from group it's not a member of - Win2k8r2

hi all,

i'm trying create new user account use iis7.5. 

when ever create new user account, default gets added users group. , seems though permissions inherits group sticks after remove group,

for example, have folder inherits permissions , part of permissions, users group has read/write permission on folder. when go advanced security , check effective permissions, new user has read/write though it's member of no group , i've given no permissions on folder. if remove users group permission folder, new user looses it's read/write access. seems though i've removed user users group, it's still sharing permissions group.

please tell me don't need reboot server change user permissions/groups. did try logging off , on had no effect.

so can tell me how user account belonging no group somehow inheriting permissions users group? 

thanks

it seems add local users. how remove new user users group? , os version , service pack version?

Windows Server  >  Security