Update your computer operating system, if necessary
To avoid complications connected with old or outdated system platforms, it is highly advised that the computer's operating system be kept up to date. As updates also contain bug patches, this will help reduce computer difficulties caused by some defects. So, if you haven't already, try looking for a system update for your Windows machine and, if one is available, download and install it. Reconnect your iPhone 8 after upgrading your PC system.
Quit or exit all running programs on your computer
Running applications on the computer can lead to conflict, particularly if one of them becomes corrupted and rogue. While computers are capable of multitasking, when numerous programs are left active in the background, things might go wrong. Other computer functionality, such as external device recognition, will be impaired as a result.
Disable security software like antivirus or firewall temporarily
Computer security software that is installed and enabled can also prevent access to external devices. When you connect your iPhone to your computer using a USB cable, it is also regarded an external device. When a firewall or antivirus detects a possible threat, access to your iPhone is denied. As a result, your computer and iOS device will no longer be able to connect. If you have any security software installed on your computer, consider temporarily disabling it before connecting your iPhone 8. When you're done managing iOS with iTunes, you may re-enable it.