Hi, I'm John! I will help you with this.
Can you please tell where the click-and-drag issue happens?
For example, does it happen on the desktop, in File Explorer, in a browser, or only inside one specific app?
Also, are you using a mouse, touchpad, or both?
If it happens everywhere, try restarting the PC first, then test with another mouse or the touchpad. This will help confirm if it is a device issue or a Windows issue.