When using Windows XP Professional as a server for more than 10 client pc, maybe you will encounter this kind of error;
No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept.
This error is caused by the limitation of Windows XP Professional to 10 connection only. To solve this problem, you have to edit your registry. Follow this steps;
1. Click START -> RUN
2. Type regedit
3. Go to \HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
4. Look for cachedlogonscount
5. Replace its value to your desired number of connection, for example 15.