2. After opening the device manager, expand the port information and check whether the communication port com 1 is enabled. If not, you can select the port, right-click and select Enable.
3. Double-click the port to view the device status:
Scheme 2: Check whether the com 1 port is occupied by other programs.
1. After opening the device manager, if the port is enabled, com 1 runs normally, which may be because it is occupied by other programs, resulting in access being denied.
2. Right-click the selected port and select Disable to stop it:
3. Restart the computer after setup. If a program uses the "com 1" port, the program will have an error. So you can know which program is using this port. Stop running or uninstall the program, and restart the enabled port to unblock it.
Scenario 3: Update the port driver
1. Open Device Manager, right-click the port and select Update Driver Software.
2. Manually find and install the driver software in the computer:
Solution 4:
1. Download and install the driver master in all the software of 360 Security Guard-Software Manager-Software Treasure House. (as shown in figure 1)
Figure 1
2. Run the driver main program, find the motherboard, and then click Update. (as shown in figure 2)
Figure 2
3. Restart the computer after installation.
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