Below are the steps on how to delete and clean the Windows clipboard:
1. On Desktop, Right click and free space
2. On the shorcut Window, Type the location of the item with the following text then click Next:
C:\Windows\System32\cmd.exe /c "echo off | clip"
3. Type the name of the ShortCut e.g: Clean Clipboard Memory then click Finish
The final shortcut Properties looks like below capture:
Any time you encountered cannot copy and paste, just click the new shortcut that we just created.
Hope this help!