XP sharing cannot be set, which can only be set in sharing, or who can access. However, you can do it with the following method. Windows XP network sharing, simple, but not safe, can only set the shared folder to read-only or "allowing network users to modify my file", so any computer settings, all with the same computer The network's computer can share this computer shared resource through "online neighbors" without any authorization. After some discovery, it was found that the default sharing of Windows XP installation was "simple sharing", resulting in "open", unsafe file sharing. Changing this "simple shared" method is to cancel the default "simple sharing" first. Open "My Computer", click "Tools → Folder Item", select "View" Tab, empty "check box before using the Simple Sharing (Recommended)" in the open dialog box. Then create a shared user. Click Start → Settings → Control Panel, open the User Account, create a password user, assume the user name User00, the machine that needs to share resources must share resources with this user. Next, set the directory you want to share (assuming to shared directory TEST1 on the NTFS partition), and set the resources that only users can share this directory: Right-click the directory "Test1" you want to share, click " Share and Security, select "Share → Shared This Folder", click "Permissions", click the "Delete" button to remove the original directory any user (Everyone) can be shared, then click the Add button, Click "Advanced → Immediately", select UserM00, click "OK" Add user user00 to add and select user user00 sharing. The computer in the LAN will now want to view the content in the shared folder, only the correct username and password can be entered or modify the content in the shared folder.