Hi mhmtkf,
Welcome to Microsoft Community.
Copy and paste failure issues can be caused by a variety of factors such as, but not limited to, system component anomalies or effects from additional processes.
If possible, would you mind sharing more information about this issue with us?
- Is the situation the same if you press the copy or paste shortcut multiple times?
- Is the situation the same if you adjust the clipboard history? Clipboard in Windows - Microsoft Support
- Is the situation the same when you observe it in a relatively clean environment (for example, new local account, safe mode, clean boot)?
Create a local user or administrator account in Windows - Microsoft Support
Start your PC in safe mode in Windows - Microsoft Support
Clean Boot starts Windows with a minimal set of drivers and startup programs. It can be used to determine whether a background service or program is interfering or causing a problem. These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step.Please be careful not to disable any services related to security credentials or security authentication, such as TPM, Security, Credential.
If I misunderstand your situation, feel free to correct me and share the information.
Best Regards,
Kyo - MSFT | Microsoft Community Technical Support