Shenan said:
Change the File and Folder Permissions so that only you and your wife's
accounts have access to the folder.
If your daughter has administrative rights to said folder - she can undo
everything you have done.
Just to give a little more detail to Shenan's good advice:
1. Disable Simple File Sharing from Folder Options>View.
2. Create user accounts with passwords for all three people. If you are
doing file/printer sharing across your Local Area Network (LAN), you
need to create the user accounts/passwords on all machines on the LAN.
You can still automatically log into a user account for convenience if
desired.
Configure Windows to Automatically Login (MVP Ramesh) -
http://windowsxp.mvps.org/Autologon.htm
3. If your daughter has a user account on your computer, make her a
limited/standard user, not an administrator.
4. Right-click on the folder and set its Sharing/Security so that only
listed accounts (yours and your wife's) have access.
Malke