A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I have been able to eliminate the Excel clipboard error issue by opening up a blank document in Word and cutting (right click) and pasting a cell from Excel into the blank Word document. After that, Excell works fine, and it's goodbye to the annoying "Clipboard cannot be emptied..." popup error. You will also notice that when you now do a drag and drop in Excel, it happens instantaneously (as expected). You can close Word after doing the cut and past workaround, and everything will still be fine with Excel. However you will have to go through this procedure every time your reboot your PC and open Excel again.
I hope other Excel users can replicate this workaround and maybe MS will pick up on it
I don't mean to belittle your efforts, but I'm afraid that's nonsensical. And I mean that in the literal sense, not the put-down sense. Also, although I tried it on the off chance... it doesn't work. I followed your instructions, then did a few things that I knew would randomly (that being the key word) trigger the error and sure enough, within 5 minutes I had it back.
Think about it for a minute, and I mean that expression in all seriousness; why would pasting something from Excel into Word when you start Excel have any effect on clipboard operations that might occur 2, 3, 4 hours later maybe?
The one, the ONLY thing that Microsoft needs to pick up on is to make this accursed, pointless, useless dialog killable. "Do not show this again. Ever. And that goes for most of the pointless, irritating dialogs that MS has made since Vista". I don't even care if it takes (yet another) Registry hack. The problem with this one is that it's so random and so pervasive and so disruptive AND so unkillable that it's just another nail that MS is hammering into its own coffin.
Note the absence of any MS representatives in here acknowledging the problem, much less promising a solution. When, not if, WHEN Google get serious about transforming Google Sheets into something more than the toys that they are now, what will MS have left? Dialogs that irritate he living bejeezes out of people for versions on end with no attempt to fix the problems.