Here is how you can solve a common problem of Copy & Paste on RDP Servers.
Step 1: Open up Task Manager (Right-click on the taskbar and select Task Manager).
Step 2: Go to the "Processes" Tab in task manager.
Step 3: Select "RDP Clipboard Monitor" and click "End Task" option.
Step 4: Click on the "File" option and then click "Run new task".
Step 5: Type "rdpclip.exe" ( without quotes )
Step 6: Click Ok.
Congratulations! Now your problem is solved. :)