Hello,
Thank you for writing to Microsoft Community Forums.
1. Since when are you facing this issue?
2. Have you made any changes on your pc, prior to this issue?
Copy & Paste issue might be caused due some services not working properly or due to system file corruption. I suggest you to follow the methods mentioned below and check if that helps.
Method 1: Perform SFC scan to repair missing or corrupted system files. Refer the following article for steps to perform SFC scan.
Method 2: You can also refer the following steps posted by Kasper RW on August 29, 2018 to fix Copy & paste issue that is caused by Nahimicsvc32.exe services.
Hope it helps.
Sandeep Kumar M
Microsoft Community – Moderator