If you are getting the following error :
"Could not attach the USB device. You can attach the USB device to different USB port or restart the Virtual machine and try again"
If you find anything similar in your system, then you may try that and see if it works for you. If you choose to do so, you will need to consider the fact that all USB devices may get temporarily disabled after uninstalling the driver. USB devices will work again after restarting the system.
In my case, it was a laptop, so I was able to restart the system with touchpad. For a desktop, both keyboard and mouse may get disabled. One workaround to this problem is if you have another computer, you can use TeamViewer or similar remote control tools to connect from the second computer to the affected computer, uninstall the said drivers and restart the affected system (from the second computer)
when trying to attach your USB device to virtual PC, and nothing worked so far, then the chances are that the problem is due to USB 3.0 host controller drivers. The way I resolved the problem was uninstalling USB 3.0 host controller
drivers. In my case, it was listed as "Intel USB 3.0 eXtensible Host
Controller Driver" in Control Panel-> Uninstall a program list, and
then restarting the system.
If you find anything similar in your system, then you may try that and see if it works for you. If you choose to do so, you will need to consider the fact that all USB devices may get temporarily disabled after uninstalling the driver. USB devices will work again after restarting the system.
In my case, it was a laptop, so I was able to restart the system with touchpad. For a desktop, both keyboard and mouse may get disabled. One workaround to this problem is if you have another computer, you can use TeamViewer or similar remote control tools to connect from the second computer to the affected computer, uninstall the said drivers and restart the affected system (from the second computer)