Cause. This issue may occur if the TCP port that is used by the VPN connection is already being used by another program. The VPN connection uses TCP port 1723 to establish a connection. If another program is already using this port, you cannot establish a VPN connection.
The error 633 denotes that the port is already in use or is not configured for Remote Access dial out. You may have to check if the VPN and dial out connection are trying to use the same port that is causing the issue. You may have to check the settings for the modem and change the port for your requirements.
Cause. This issue may occur if the TCP port that is used by the VPN connection is already being used by another program. The VPN connection uses TCP port 1723 to establish a connection. If another program is already using this port, you cannot establish a VPN connection.
“Error 633: The device (or another device’s connection) is already in use or configured incorrectly.” In many cases, this inconvenience occurs after an event that changes the settings and propensities of the affected computer (for example, a Windows update for an update).
This error can occur if the communication port (COM) used by the modem has already been reserved by other software, or if multiple Internet connections have been established. As a first troubleshooting concept, you can uninstall and reinstall the modem driver.
I installed a special “33600 bps standard serial modem” that uses COM1. Then I created a new DialUp add-on. Currently, whenever I try to open a dial-up connection, I get error 633 (Modem or other connection device already in use, not configured to work). When I install the modem on WinXP it works fine.
How do I fix Error 633 The modem is already in use?
Fixed: Error 633 The modem (or many other connected devices) is not working…
- Solution 4: Install any unnecessary programs for Planet devices.
- Solution 2: Disable your network connection and then re-enable it.
- Solution 3: Update your network adapter driver.
- Solution 4: Uninstall (and then reinstall) the Meet adapter.
How do I fix Error 633 on my modem?
Fixed: Error 633 Creating a link to the modem (or other device) is already in progress…
- Solution 1: Install almost all unnecessary programs for Internet devices.
- Solution 2: Disable your amazing connection network and then re-enable it.
- Updated solution Figure 3: Drivers for your card adapter.
- Solution 4: Uninstall (and you will need to reinstall) your network adapter.
Why do I get VPN error 633 in Windows 10?
In short, VPN error 633 found in Windows 10 mostly occurs when prt is already being used for VPN communication due to a Windows Expert update or due to outdated hub drivers. Today we saw the VPN strategies our support engineers use to fix this error. Fixing VPN error 429 is easy!
How do you fix error 633 on Iphone?
Help me please!
- Methods to fix the service “Error 633: The modem has been used in the past or is not working properly”
- Launch the built-in registry editor.
- Reserve the TCP port.
- Update/reinstall your modem drivers.
- Prevent websites, ISPs and other third parties from tracking you.
- Fast data recovery. Lost apps. < /ol>
- Solution 1: Install all unnecessary computer programs for browsing the Internet.
- Solution 2: Disable and re-enable your network connection.
- Solution 3: Update the network drivers from adapter. .< /li>
- Solution Uninstall 4: (then reinstall) your website 2 . 0 adapter.
- At least one solution: all installed programs and all unnecessary programs for devices around the world.
- Solution 2: Disable your network connection and re-enable it if needed.
- Solution 4: Then uninstall (and install) your vendor’s adapter.
- Methods to resolve the error “Error 633: The modem is already in use or is not working correctly”
- Launch the customized registry editor.
- Reserve the TCP port.
- Update/reinstall your modem drivers.
- Prevent tracking by websites, ISPs and other parties.
- Recover lost formats quickly.
What is the Error code 633?
Many users report modem error 633. This incorrect choice indicates that your modem has not always been configured correctly. This error can occur if the communication port created by your modem has been occupied by other software. Error 633 also occurs when users mount multiple internet connections.
Which has failed the error code returned on failure is 633?
“Error 633: The modem is already registered or incorrectly configured” is not really device-specific, as any make and model of PC could potentially be affected. The error message explicitly states that the switch is down due to a misconfiguration.
How do I fix Error 633 The modem is already in use?
Fixed: Error 633 The modem (or other devices) is already connected to…
How do I fix Error 633 on my modem?
Fixed: Error 633 The modem (or several connected devices) is already in…
< li>Solution 3: Update adapter drivers over the network.
< /ol>
Why do I get VPN error 633 in Windows 10?
In short, VPN error 633 on Windows 10 mostly only occurs when the VPN connection is already in use due to a Windows Builder update or outdated computer drivers. Today we saw ideas from our VPN support engineers to fix this error. Easy VPN Error Fix
429!!
How do you fix error 633 on Iphone?
Help me please!
< /ol>
What is the Error code 633?
Many visitors report modem error 633. This error means that your modem is not working properly. This error may occur if your personal modem’s communication port has been reserved by other software. Error 633 can also occur when users set up multiple Internet connections.
Which has failed the error code returned on failure is 633?
“Error 633: Modem is already required or incorrectly configured” applies not only to a specific device, but to all PC models and models. The error specifically indicates that the switch is down due to a misconfiguration.

Ermias is a tech writer with a passion for helping people solve Windows problems. He loves to write and share his knowledge with others in the hope that they can benefit from it. He’s been writing about technology and software since he was in college, and has been an avid Microsoft fan ever since he first used Windows 95.