Cannot share clipboard when using Microsoft Remote Desktop Connection to Windows7

You should try to make sure the process rdpclip.exe is running in your Windows 7 box.
If it is, try killing it and restarting it.

This process transfers the clipboard contents over RDP.

Batch this, and use it in a CMD file, Make a program Group / Desktop link to the batch for Citrix PS users, or even better, use VBS to do the task and Link it to the Desktop:

%SystemRoot%\system32\Taskkill.exe /im rdpclip.exe /f /t

%SystemRoot%\system32\rdpclip.exe

Something I found on the Windows forums is to enable all of the drives as local resources (check the box labeled "Drives") when you connect to the remote machine. This allows me to copy and paste now.