This one’s been bugging me for years. You know the situation, you’re happily using a remote desktop connection, and all of a sudden the clipboard stops working for no apparent reason.
I recently stumbled across a ‘fix’ for this. It’s more of a workaround than a fix, as you’ll need to do it every time the clipboard disappears.
Just look for a process named rdpclip.exe on the machine you’re remoting to, and kill it, then restart it.
You should find you’re able to copy/paste again.