Hi, I found this solution from another forum, it works for me and perhaps you guys might find it useful
Solved: Folder Lock Icon - Tech Support Guy Forums
here may be other reasons for the lock overlay on a folder icon, but what I've found is the lock overlay means the file/folder permissions have been changed and is restricted in some way from what would be inherited, usually that not every one has access to read the folder and it's contents.
For example, if you remove the
HomeUser group from having Read & Execute permission to a folder under My Documents, the lock overlay will appear. (I do have my Documents shared in a HomeGroup)
Removing the Users and Authenticated user groups from a folder created in the root of a drive will also add the lock overlay to the folder icon.
You can remove the lock overlay in this case by resetting the permissions to be inherited, and removing all permissions that are not inherited.
Right click the folder, click
Properties
Click the
Security tab
Click
Advanced
Click
Change Permissions
Check Both boxes to
Include inheritable permissions, and to
Replace all child object permissions
Click
Apply then click
Yes
Wait for the list to refresh
Remove all permissions that say
<not inherited>
That should remove the Lock overlay.
You may need to Uncheck
Use Sharing Wizard in
Control Panel | Folder Options | View tab to see the Security tab, and may have to boot to Safe Mode as well if running Home Basic or Premium.
If you are not sure about what the permissions do, may be best to leave them alone. Definitely,
do not add a Deny permission of any kind unless you are
certain of how it will work. You can lock yourself out of the system by adding a Deny permission in the wrong place, especially if you deny a group rather than a user.