Completely solve the problem of COM Port is occupied (in use) Open the registry hkey_local_machine\system\currentcontrolset\control\com Name Arbiter Remove the Comdb and try again! (Note: This will rebuild all COM ports). If not, restart your computer! also can see if the integrated modem occupies your serial port. Open the Phone/modem options in the Control Panel, If there is a connection in the Modems tab that occupies this serial port (such as COM1) Solution: If there is a connection to occupy this serial port, directly delete this connection, restart the computer, problem resolution. or see the detailed reason: 1, start with Safe mode, use the "HyperTerminal" in the system's own communication to test the serial port (COM1), The same error, but the wrong information more detailed, as follows: ****** error messages ******** Windows reported a TAPI error (80000048). Use the phone/Modem Options icon in the Control Panel to confirm that your modem is installed correctly. ********************** 2, then the computer started normally. Open the "Phone/Modem Options" in the Control Panel, Discover the "modem" There is a connection in the tab that takes up the serial port (COM1), immediately deletes the connection. re-use "HyperTerminal" Test serial port (COM1), no error, said communication with the serial port (COM1) is normal. 3, the serial device connected to the serial port (COM1), with the relevant software and equipment communication, normal, problem solving. due to Windows inexplicably registry reason, many users found that after installing the Bluetooth management software, the corresponding Bluetooth virtual port actually became COM9, even COM13 or higher, resulting with many applications, such as mobile phone synchronization software, PDA sync software is not available, multiple reinstallation of Bluetooth management software will only make the situation worse. The solution is as follows (before performing the following steps, be sure to uninstall the Bluetooth hypervisor and reboot) 1. In Windows system, press Start > Execute > Input cmd, press ENTER 2. After the command Character window appears, enter set Devmgr_show _nonpresent_devices=1 Press ENTER Devmgmt.msc Press ENTER 3. Then in Device Manager, click > View > Show hidden devices You can now delete the extra port, after the deletion, be sure to reboot the 4. Reinstall the Bluetooth management software 5. If you want to permanently put this environment variable into XP, after going to my Computer > Click to select it, right-click > Properties > Advanced > Environment variable inside the system variable, press "new" and fill in "Variable name" Devmgr_ Show_nonpresent_devices ", variable value filled in" 1 "
To completely resolve the problem with the COM port being occupied (in use)
