Depending on the type of error message you see, here are several things you can try:
Not enough memory. Close your other programs, and then try connecting again. If the problem continues, restart your computer, and then try connecting again. If you still can't connect, contact your network administrator or technical support. (For more information, see Preventing low memory problems.)
Network failure. Make sure that your router is turned on (home networks only), the Ethernet cable is plugged into your network adapter (wired networks only), your computer’s wireless switch is turned on (mobile computers on wireless networks only), and your network adapter is working.
If the problem continues, contact your network administrator or the person who set up your network.
The remote computer cannot be found. Ask the administrator of the remote computer to verify the computer name, and make sure you typed the name correctly. If you still can't connect, try typing the IP address of the remote computer instead.
Connecting a home computer to a computer on a corporate domain requires an intermediate step to ensure that the computers can communicate. One way to do this is to establish a virtual private network (VPN) connection to the corporate network. Another way is to use a Terminal Services Gateway server.
If you have problems doing either of these things, contact your system administrator or technical support.
Connecting two home computers across the Internet is also possible. However, doing this typically requires detailed knowledge of the router configuration, port mappings, and IP addresses.
If authentication is enabled, you must type a full computer name (for example, Computer1.Example.com) on the General tab of the Remote Desktop Connection dialog box. For a definition of full computer name, see "What is a full computer name?" in Remote Desktop: frequently asked questions.
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To find out what level of authentication is enabled:
1.
Open Remote Desktop Connection by clicking the Start button , clicking All Programs, clicking Accessories, and then clicking Remote Desktop Connection.
2.
In the Remote Desktop Connection dialog box, click Options, and then click the Advanced tab.
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To find the full computer name of the remote computer, follow these steps on the remote computer:
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Open System by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking System.
The full computer name is listed under Computer name, domain, and workgroup settings.
Here are some other possible causes of connection problems:
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The Remote Desktop port might be blocked by a firewall.
If you're using Windows Firewall, follow these steps:
1.
Open Windows Firewall by clicking the Start button , clicking Control Panel, clicking Security, and then clicking Windows Firewall.
2.
Click Allow a program through Windows Firewall. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
3.
Select the Remote Desktop check box.
If you are using a different firewall, make sure the port for Remote Desktop (usually 3389) is open.
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Remote connections might not be enabled on the remote computer. To fix this:
1.
On the remote computer, click the Start button , right-click Computer, and then click Properties.
2.
In the left pane, click Remote Settings. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
3.
Under Remote Desktop, click either Allow connections from computers running any version of Remote Desktop or Allow connections only from computers running Remote Desktop with Network Level Authentication.
4.
Click OK.
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The remote computer might be asleep or hibernating. To fix this, make sure the settings for sleep and hibernation on the remote computer are set to Never. (Hibernation is not available on all computers.) For information about making those changes, see Change, create, or delete a power plan (scheme).
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You cannot connect remotely if your user account does not have a password. To add a password to your account, see Protect your computer with a password.
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The remote computer might be too busy to accept any more connections right now. Wait a while, and then try connecting again.
If you can see the logon screen of the remote computer but you can't log on, add yourself to the Remote Desktop Users Group or to any group with administrative rights on the remote computer (or ask the administrator of the remote computer to do this). For more information, see Add a user account to a group.
Make sure you have redirected the Clipboard so that you can use it on the remote computer. To do this:
1.
Open Remote Desktop Connection by clicking the Start button , clicking All Programs, clicking Accessories, and then clicking Remote Desktop Connection.
2.
In the Remote Desktop Connection dialog box, click Options, and then click the Local Resources tab.
3.
Under Local devices and resources, select the Clipboard check box, and then click Connect.
Using a password-protected screen saver can cause this. Don't minimize the Remote Desktop Connection dialog box if you have a password-protected screen saver, or don't use a password-protected screen saver.
If your computer is part of a domain, by default you aren’t allowed to save your credentials when you connect to a remote computer. But you can change this.
You must be logged on as an administrator to perform these steps.
1.
Click the Start button , type gpedit.msc, and then press ENTER. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
2.
Under Computer Configuration, double-click Administrative Templates, double-click System, and then double-click Credentials Delegation.
3.
In the right pane, double-click Allow Saved Credentials with NTLM-only Server Authentication.
4.
In the dialog box that appears, click Enabled, and then click Show.
5.
In the Show Contents dialog box, click Add, type the name of the remote computer (server) in this format: TERMSRV\<computername>, and then click OK.
NoteBe sure to capitalize “TERMSRV” as shown. <computername> can either be the name of a specific remote computer (for example, TERMSRV\myremotepc) or you can use an asterisk (*) to include a group of computers (for example, TERMSRV\* or TERMSRV\*.corp.com). <computername> should exactly match the name you enter in the Computer box in Remote Desktop to connect to that remote computer.
Router
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Router
A device that sends, or routes, information between two networks (for example, between a home network and the Internet). Routers find the quickest paths for sending information, which makes network connections faster. Routers can be wired or wireless.
Port
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Port
A hardware- or software-based interface used to transfer information between a computer and other devices. Hardware ports are physical connections that are visible on the outside of the computer. Software ports are the numbered gateways in programs that software programs use to exchange information.
Authentication
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Authentication
The process of determining the identity of the user attempting to access a system. For example, user names and passwords are commonly used to authenticate users.
Network adapter
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Network adapter
A device that connects your computer to a network. Sometimes called a network interface card (NIC).
Clipboard
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Clipboard
A temporary storage area used by Windows. Information (such as text, files, graphics, sound, or video) can be copied to the Clipboard from one program or location and pasted elsewhere. The Clipboard can only hold one piece of information at a time. Whenever something is copied to the Clipboard, it replaces whatever was there before.
Virtual private network (VPN)
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Virtual private network (VPN)
A network that connects one or more computers to a large network, such as a business network, using the Internet. A VPN is encrypted, so only authorized people have access to it.
IP address
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IP address
Short for Internet Protocol address. An IP address identifies a computer that is connected to the Internet or a network. An IP address usually consists of four groups of numbers separated by periods, such as 192.200.44.69.
Firewall
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Firewall
Software or hardware that can help protect a computer from hackers or malicious software. A firewall helps prevent malicious software (such as worms) from gaining access to a computer through a network or over the Internet, and helps prevent a computer from sending malicious software to other computers.
Remote computer
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Remote computer
A computer located elsewhere that you can connect to from your computer by using remote access software (such as Remote Desktop Connection) and a modem or Internet connection.
Help and How-to
