Serial Port Driver Service Defaults in Windows 7
Serial Device Driver by Microsoft Corporation.
Default Settings
| Startup type: | Manual |
| Display name: | Serial Port Driver |
| Service name: | Serial |
| Service type: | kernel |
| Error control: | ignore |
| Group: | Extended base |
| Path: | %SystemRoot%\system32\DRIVERS\serial.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Serial |
Default Behavior
Serial Port Driver is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Serial Port Driver fails to load or initialize, Windows 7 startup continues without error messages. The failure details are being written into Event Log.
Restore Default Startup Configuration of Serial Port Driver
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config Serial start= demand
3. Close the command window and restart the computer.
The Serial service is using the serial.sys file that is located in the C:\Windows\system32\DRIVERS directory. If the file is removed or corrupted, read this article to restore its original version from Windows 7 installation media.