1.Use Firewall Application.
2.Disable All Setting Which Is Used For Remote Desktop.please check these..
{How to Configure a Remote Desktop
To configure a remote desktop connection between a remote Windows XP Professional-based computer and a local computer running one of the versions of Windows listed earlier in this article, follow these steps.
Step 1: Configure the Remote Computer
On the remote Windows XP Professional-based computer, follow these steps:
Click Start, and then right-click My Computer.
On the shortcut menu that appears, click Properties.
Click the Remote tab, and then click to select the Allow users to connect remotely to this computer check box.
When you are prompted to confirm this change, click OK.
Click Select Remote Users, and then click Add to specify additional user accounts to be granted remote access.
NOTE: Administrators are automatically granted remote access privileges.
When you are finished adding user accounts, click OK. Make sure that the account that is being added does actually exist on the remote computer. If the account does not exist on the remote computer, create it.
Click OK, and then click OK again.
Step 2: Configure the Local Computer
Configure the Remote Desktop feature on the Windows-based computer. To do this, follow these steps:
Insert the Windows XP compact disc (CD) into the CD-ROM drive or DVD-ROM drive on the local computer.
On the Welcome to Microsoft Windows XP screen that appears, click Perform additional tasks.
Click Set up Remote Desktop Connection.
Follow the steps of the Remote Desktop Connection InstallShield Wizard to install Remote Desktop Connection.
NOTE: If Remote Desktop Connection is already installed, you may receive the following error message:
Remote Desktop Connection cannot be installed because your operating system already has a built-in version. See More Programs&;Accessories&;Communications&;Remote Desktop Connections on your start menu.}
3.Use Antivirus Software And It's settings.
4.Change All Password (User).
5.Otherwise Help Of ISP (Internet Service Provider )